FI129732B - Respiratory device - Google Patents

Abstract

The invention relates to a respiratory device suitable for cleaning air to be inhaled by a user. The respiratory device (10) comprises a body (40) comprising a middle layer (30) and an outer layer (20). The middle layer (30) is able to pass air through and configured to create an air space for the respiratory device (10), the air space of the middle layer (30) being at least 1.5 L, preferably at least 2 L, and the outer layer (20) is able to pass air through and configured to form cleaned air by removing from the air at least 90%, preferably at least 95%, of particles having a diameter equal or more than 10 µm. The respiratory device (10) is configured to supply air through the outer layer (20) to the middle layer (30). The outer layer (20) has a surface area of at least 1500 cm2. This invention further relates to a garment, a sport equipment or a backpack comprising a respiratory device and a use of a respiratory device to protect a user of the respiratory device (10) from air pollution.

Description

RESPIRATORY DEVICE Technical field This invention relates to a respiratory device. Background Respiratory concerns apply widely to the healthy area, particularly with certain medical conditions, such as asthma or allergy. Internal tissues and cells within airways and lungs are vulnerable, for example, to cold air, pollen and air pollution. Those can have an effect on all people, the young and the elderly as well as people living in areas having heavy rate of air pollution being particularly vulnerable.

A publication KR 20180088976 A discloses a mask with fine dust filter. A utility model CN 206045212 U discloses a wearable air purifying device. Specialist mask, such as medical or industrial masks may not be practical or economic for personal apparel. Thus, there is a need for a novel respiratory device. Summary tis an aim of the present invention to provide an improved respiratory device. N A respiratory device for the purpose is presented in independent claim 1 of the N present application. A garment comprising a respiratory device is presented — in claim 13 of the present application. A sport equipment or a backpack N comprising a respiratory device is presented in claim 14 of the present I 30 application. A use of a respiratory device to protect a user of the respiratory a o device from air pollution is presented in claim 15 of the present application. 2 O The respiratory device suitable for cleaning air to be inhaled by a user can N comprise a body of the respiratory device. The body can comprise a middle layer and an outer layer.

The outer layer can have a surface area of at least 1500 cm?, preferably at least 2500 cm?, for filtering air to be breathed. Thus, the novel respiratory device can improve an easiness of breathing. Further, the outer layer can have a surface area of equal or less than 5000 cm?, preferably equal or less than 4000 cm?. In this application, the surface area of the outer layer refers to an area of the outer surface of the outer layer. The middle layer of the respiratory device can be able to pass air through. Further, the middle layer can be configured to create an air space for the respiratory device. The air space of the middle layer can be at least 1.5 L, preferably at least 2 L, more preferably at least 2.5L and most preferably at least 3 L. The air space of 1.5 L can be used, for example, for children. The air space of at least 2 L can be used for adults. The larger air space of 2.5 L, preferably 3 L, can improve an easiness of breathing.

The respiratory device can comprise at least one air channel able to guide the filtered air from a body of the respiratory device to a user. The air channel can be connected to a facial and/or mouth and/or nose respiratory mask. Thus, the respiratory device can comprise a mouth insert. Alternatively, or in addition, the respiratory device can comprise a facial mask. Thus, the mask and/or the mouth insert can be connected to the air channel in order to guide the filtered air from the respiratory device to a user. Said facial and/or mouth and/or nose respiratory masks are known for a person skilled in the art. The outer layer of the respiratory device is able to pass air through. The N respiratory device can be configured to supply air through the outer layer of N the respiratory device to the middle layer of the respiratory device. The outer = layer is configured to form cleaned air by removing at least 90% of particles N having a diameter equal or more than 10 um. This kind of filtering effect can I 30 be suitable, for example, for filtering saw dust or similar material. The outer - layer can be configured to remove at least 90% of particles having a diameter 5 of at least 5 um. Preferably, the outer layer is configured to remove at least 3 95% of particles having a diameter of at least 2.0 um. Thus, the respiratory device can be suitable to remove most of harmful particles from inhaled air.

A thickness of the outer layer is preferably at least 1 mm and preferably not more than 4 mm. The outer layer can comprise or be made of microfibers or nanofibers. Preferably, the outer layer comprises polypropylene and/or activated carbon fibers.

Further, the middle layer does not preferably remove particles from the air, at least not significantly. Thus, the middle layer can be able to pass through at least 95% of particles having a diameter equal to or less than 50 um. This can improve the easiness of breathing.

In order to further improve the easiness of breathing, the middle layer can comprise a porous mesh. A mesh size, i.e., a mesh number, of the porous mesh can be from 8 to 15, according to US measurement standard. The flexible porous mesh preferably comprises polyurethane and/or stainless steel. Athickness of the middle layer can be from 10 mm to 20 mm. The respiratory device can comprise an air channel able to guide the cleaned air from the respiratory device to a user. The respiratory device can further comprise a facial mask and/or a mouth insert. Furthermore, the respiratory device can comprise means for preventing backflow of exhaling air from the mouth insert or facial mask to the middle layer of the respiratory device. The respiratory device is preferably bendable; thus, it can be a part of a shirt or another garment.

N The respiratory device can be demountable. The respiratory device can be, for N example, a part of a cloak, shirt or bag. N Thanks to the present invention, the novel respiratory device can protect a user I 30 from air pollution. Furthermore, the novel respiratory device can be used for > conditioning of inhaled air, such as by air warming utilizing the wearer's body 5 heat. 3 Brief description of the drawings

In the following, the present invention will be described in more detail with reference to the appended drawings, in which Fig.1 illustrates a perspective view of a respiratory device, showing also a part of an inner structure of the respiratory device, Figs 2a-b illustrate a respiratory device, which is a part of a shirt, Fig. 3a illustrates an advantageous example of a suction basket and an air channel attached therein, Fig. 3b illustrates a front view of a part of a respiratory device having a suction basket, Fig. 4a illustrates an embodiment of a suction basket and an air channel attached therein, and Fig. 4b illustrates an example of an air channel attached to a suction basket of the respiratory device.

Detailed description The following reference numbers are used in this application: 10 respiratory device, 20 outer layer of the respiratory device, 20a first outer layer, 20b second outer layer, 30 middle layer of the respiratory device, 40 body of the respiratory device comprising the middle layer and the outer N layer, N 41 suction basket of the body of the respiratory device, = 50 air channel for inhaling, N 51 first air channel for inhaling, and x 30 52 second air channel for inhaling. S In this application, the term “respiratory device” refers to a device that can be 3 used to filtrate air to be inhaled.

O N

In this application, the term “body 40 of the respiratory device” refers to an outer layer and a middle layer of the respiratory device. The body 40 of the respiratory device can further comprise a suction basket 41.

5 An advantageous embodiment of the suction basket is illustrated in Figs 3a and 3b. Another embodiment of the suction basket is illustrated in Figs 4a and 4b.

In this application, the term *nanofiber” refers to a fibre with a diameter less than 1.0 micrometer, preferably less than 0.5 micrometers. In this application, the term “microfiber” refers to a fibre with a diameter less than 5 micrometers, preferably less than 2 micrometers, and at least 1 micrometer.

The respiratory device 10 is suitable for cleaning air to be inhaled by a user. The respiratory device 10 comprises at least two layers: a middle layer 30 and an outer layer 20. The respiratory device 10 is configured to supply air through the outer layer 20 of the respiratory device 10 to the middle layer 30 of the respiratory device 10. The middle layer 30 is preferably a reticulate and/or porous inner part of the respiratory device 10. Thanks to the reticulate and/or porous permeable middle layer 30, air can flow easily through the fabric forming the middle layer 30.

N The middle layer 30 of the respiratory device 10 can be configured to create N an air space for the respiratory device 10. The air space of the respiratory = device 10 is preferably at least 1.5 L, more preferably at least 2 L, and most N preferably at least 3 L to improve an easiness of inhaling. Typically, the air I 30 space of the respiratory device 10 is less than 10 L, more preferably less than - 5 L, hence, the respiratory device 10 can be easy to carry around. A thickness 5 of the middle layer 30 is preferably at least 8 mm, more preferably at least 10 3 mm, such as from 10 mm to 30 mm, and most preferably at least 15 mm, such as from 15 mm to 25 mm to obtain said air space for the respiratory device 10.

The middle layer can consist of one layer. In this case, the middle layer does not comprise adhesive layer(s) or other separate layer(s) inside the middle layer. This can improve an easiness of inhalation.

Breathing through the respiratory device 10 can be easy, thanks to the middle layer 30 forming the air space for the respiratory device 10. At the time of inhalation, air enters from the middle layer 30, which is not significantly filtering the air, through the air channel, e.g. a first air channel 51 and/or a second air channel 52, to the user.

The outer layer 20 of the respiratory device 10 is configured to form cleaned air by removing at least 90% of particles having a diameter equal to or more than 10 um. Therefore, the outer layer 20 filtrates air to make the air easier and/or safer to breath.

To improve the effectiveness of the respiratory device 10, the outer layer 20 of the respiratory device 10 can be configured to remove at least 90% of particles having a diameter of at least 5 um, more preferably at least 90% of particles having a diameter of at least 2.0 um. This can clean the polluted air efficiently, hence, the air to be inhaled can be substantially clean. To improve easiness of inhaling, the outer layer 20 can have a surface area of at least 2800 cm?, more preferably at least 3500 cm?, and most preferably at least 3800 cm?. Thus, thanks to the outer layer 20 having said large surface area, it can be very easy to breathe through the respiratory device 10. N Furthermore, the outer layer 20 can have a surface area egual to or less than N 5000 cm?, hence, the respiratory device 10 can be easier to use. At the time = of inhalation, the air to be inhaled goes from the middle layer 30 to the user N and new air enters through the outer layer 20 to the middle layer 30. I 30 - The middle layer 30 of the respiratory device 10 is able to pass air through. S Advantageously, the middle layer 30 does not significantly participate in O filtration. Therefore, preferably at least 98%, more preferably at least 99% and N most preferably 100% of particles passed through the outer layer 20 can pass through the middle layer 30. This can improve easiness of inhaling.

To further improving easiness of inhaling, the middle layer 30 can be able to pass through at least 95% of particles having a diameter of 50 um or less. To even further improving easiness of inhaling, the middle layer 30 is preferably able to pass through at least 95% of particles having a diameter of 70 um or less, most preferably at least 95% of particles having a diameter of 100 um or less. A thickness of the middle layer 30 can be at least 7 mm, more preferably at least 10 mm, and most preferably at least 13 mm, for example from 7 mm to 40 mm. In addition, the thickness of the middle layer 30 is preferably equal to or less than 30 mm, and more preferably equal to or less than 20 mm, for example from 10 mm to 20 mm. Said thickness has a technical effect of forming a suitable air space, hence, it can improve easiness of breathing. The middle layer 30 can comprise porous mesh. The porous mesh can have a mesh size from 7, more preferably from 8 and most preferably from 10, to 25, more preferably to 20 and most preferably to 15, according to US measurement standard. Said mesh size can improve the easiness of breathing.

The middle layer 30, i.e., the porous mesh of the middle layer 30, can comprise polyurethane and/or stainless steel and/or jute fiber net. These materials can be used to provide respiratory device having improved properties. Preferably, the middle layer 30 comprises polyurethane and/or stainless steel. The amount of the polyurethane and/or stainless steel can be at least 50 wt.%, more N preferably at least /0% wt.%, such as at least 80 wt.%, and most preferably at N least 90 wt.%, for example at least 99 wt.%, calculated from total weight of the = middle layer 30. A respiratory device comprising these materials can be easily N manufactured. Further, the respiratory device can be easily cleaned. z 30 Furthermore, the middle layer 30 can be flexible. Still further, the middle layer > 30 can easily keep the needed air space. 3 O The body 40 of the respiratory device can comprise a bendable middle layer N 30. Further, the body 40 of the respiratory device can comprise a bendable — outer layer 20. Thus, the body 40 of the respiratory device can be flexible.

Therefore, the respiratory device can have a large filtering area and still a garment comprising the respiratory device can be comfortable to wear.

The outer layer 20 can comprise - first outer layer 20a of the respiratory device on a first side of the middle layer 30, and - second outer layer 20b of the respiratory device on a second side of the middle layer 30.

Thus, the middle layer 30 is preferably, at least mostly, between the first outer layer 20a and the second outer layer 20b of the respiratory device. Thus, thanks to said middle layer 30, the outer layers 20a,20b can always be separated from each other, even if there is some pressure on the respiratory device caused by, for example, a user. This can further improve said easiness of breathing.

Thus, the first outer layer 20a is preferably adjacent to the second outer layer 20b. Said outer layers can form edges so that the first outer layer 20a is connected to the second outer layer 20b at the edges.

The first outer layer and the second outer layer are preferably used for filtering inhaled air. Thus, the area that is filtering air to be inhaled can be large. This can improve an effectiveness of filtering. Furthermore, due to said large filtering area through which air can be inhaled, easiness of inhaling can be improved. Furthermore, a garment comprising the respiratory device comprising two breathable outer layers can be comfortable to use.

N N The middle layer 30 is preferably bendable. Therefore, the middle layer 30 is = preferably able to bend reversible at least 5°, more preferably at least 40°, N such as from 80° to 90° without breaking. In other words, a planar middle layer I 30 30 can be bent at least 5” more preferably at least 40°, after which it can be > returned to its original form without breaking. Thus, the respiratory device can S have a large surface area and still be a part of a garment, such as a shirt.

> N A thickness of the outer layer 20 can be at least 0.5 mm, more preferably at least 1.0 mm, and most preferably at least 1.5 mm. In addition, the thickness of the outer layer 20 is preferably equal to or less than 4 mm, more preferably equal to or less than 3 mm and most preferably equal to or less than 2 mm. Said thickness has a technical effect of improving easiness of breathing while filtering air to be breathed.

The outer layer 20 can comprise microfibers and/or nanofibers, preferably at least 30 wt.%, more preferably at least 40 wt.%, and most preferably at least 50 wt.% calculated from total weight of the outer layer 20. The microfibers as well as nanofibers can improve the filtering effect of the outer layer 20 and improve contaminate holding capacity.

The outer layer 20 can comprise or be made of a nonwoven fabric. Nonwoven fabric can be efficiently manufactured and the respiratory device comprising the outer layer having nonwoven fabric can be comfortable to use.

— For further improving the outer layer 20, the outer layer 20 can comprise polypropylene. The amount of the polypropylene can be at least 30 wt.%, more preferably at least 50% wt.%, such as at least 70 wt.%, and most preferably at least 80 wt.%, for example at least 90 wt. %, calculated from total weight of the outer layer 20. Thanks to the outer layer 20 comprising said polypropylene, the outer layer 20 can be efficiently manufactured as well as have good filtering properties.

For improving the filtering efficiency of the respiratory device, the outer layer 20 can comprise activated carbon fibers (ACF). The activated carbon fibres are fibrous form of activated carbon. They can be e.g. dispersed and/or co- N woven into the outer layer 20. The amount of activated carbon fibers in the N outer layer 20 can be at least 5 wt.%, more preferably at least 10 wt.%, and = most preferably at least 15 wt.% calculated from total weight of the outer layer.

N The outer layer can comprise, for example, an active carbon fibers layer.

I 30 Furthermore, the amount of activated carbon fibers in the outer layer 20 can > be equal or less than 30%. Thanks to the activated carbon fibers, at least some 5 of the odors, vapors, bacteria, viruses and other contaminants from the air to 3 be breathed can be removed. However, the respiratory device does not need to have said activated carbon layers.

The first outer layer 20, 20a, and/or the second outer layer 20, 20b can comprise one or more than one layers. The outer layer can comprise, for example, an active carbon fiber layer on another material layer.

The respiratory device 10 can comprise at least one air channel 50, 51, 52 for guiding the filtered air from the body 40 of the respiratory device 10. Further, the body 40 of the respiratory device 10 can comprise at least one aperture through which the filtered air can be conveyed. The air channel 50, 51, 52 is preferably sealed to the aperture of the body 40 of the respiratory device 10.

Thus, thanks to the air channel 50, 51, 52 providing a passage for the filtered air from the body 40 of the respiratory device 10, the filtered air can be led via the air channel 50, 51, 52 from the respiratory device 10 to a user using the respiratory device 10. Preferably, the body 40 of the respiratory device 10 comprises one aperture per one air channel 50, 51, 52. The aperture can comprise a valve. Alternatively, or in addition, the air channel 50, 51, 52 and/or the mask and/or the mouth insert can comprise a valve.

The respiratory device 10 can comprise a suction basket 41 of the body 40 of the respiratory device 10. The suction basket 41 can be e.g. a stainless-steel basket. The suction basket 41 can be used to collect the filtered air from the middle layer 30 of the respiratory device and transfer it to the air channel 50, 51, 52 for breathing.

The air channel 50, 51, 52 can be flexible. Thus, the air channel 50, 51, 52 preferably comprises, or is made of, flexible rubber or similar flexible material.

N The flexible air channel 50, 51, 52 can be comfortable to use.

N = The air channel 50, 51, 52 is preferably an empty conduit, i.e., a conduit which N does not filter the air. Thus, easiness of breathing through the respiratory x 30 device 10 can be improved.

O 5 The air channel 50, 51, 52 can comprise a first valve and a second valve. 3 Inhaled air is generally oxygen-rich, whereas exhaled air is generally carbon dioxide-rich. Thus, the exhaled air should be removed from the system. The respiratory device 10 can comprise means for preventing back flow of exhaling air to the respiratory device 10 such as a control valve. Thus, in an embodiment, the respiratory device 10 comprises the air channel 50, 51, 52, which comprises at least one valve preventing back flow of exhaled air to the body 40 of the respiratory device 10.

A first valve of the air channel for inhaling 50, 51, 52 can be open during inhalation, hence, it is possible to obtain filtered air from the respiratory device

10. Further, the first valve of the air channel 50, 51, 52 for inhaling is preferably closed during exhalation, hence, the exhaled air cannot go back to the body 40 of the respiratory device 10.

A valve of a third air channel for exhaling can be closed during inhalation, hence, the air to be breath will go from the respiratory device 10 to the user. Further, the valve of the third air channel for exhaling is preferably opened and open during exhalation. Thus, the exhaled air can leave the system.

Therefore, at the time of exhalation, the valve of the third air channel can be opened to permit the exhaled air to pass to the atmosphere, and the first valve can be closed to isolate the respiratory device 10 from the exhaled air.

Further, at the time of inhalation, the first valve can be opened and the valve of the third air channel can be closed to permit the inhaled air to pass to the user.

Further, the exhaled air is not only carbon dioxide rich but also more humid than inhaled air. Thus, the exhaled air is preferably discharged from the system N away from the user's face. In an embodiment, the exhaled air is guided via the N third air channel out of the system. In an embodiment, at least some of the = moisture from the exhaled air is collected to a reservoir.

N I 30 The respiratory device 10 can be suitable to be used with element(s) to - interface with oral, i.e. mouth orifice. Furthermore, the respiratory device 10 5 can be suitable to be used with element(s) to interface with nasal, i.e. nose 3 orifices.

N Thus, the respiratory device 10 can comprise at least one element which interface with oral and/or nasal orifice(s). The at least one element which interface with oral and/or nasal orifice(s) can comprise a facial mask to cover mouth and/or nose. Alternatively, or in addition, the at least one element which interface with oral or nasal orifice(s) can comprise a mouth insert.

Therefore, the respiratory device 10 can comprise a facial mask and/or a mouth insert. Thus, the filtered air can be led, via the facial mask and/or the mouth insert, from the respiratory device 10 to a user using the respiratory device 10. The facial mask and/or the mouth insert can be used together with the air channel 50, 51, 52 for guiding the filtered air from the respiratory device 10 to the user.

As discussed above, the respiratory device 10 can comprise at least one air channel 50, 51, 52 connected at one end to the body 40 of the respiratory device 10 and at another end to the facial mask and/or the mouth insert.

The mouth insert can be a part of the air channel 50, 51, 52. Thus, the air channel 50, 51, 52 can be shaped so that one end of the air channel 50, 51, 52 is suitable to be kept in a mouth.

If the respiratory device 10 comprises the facial mask, the facial mask is preferably made of flexible material, such as rubber or flexible plastic. Thus, the respiratory device 10 can be fitted onto the face of the user, hence, it is possible to prevent direct penetration of ambient polluted air.

The respiratory device 10 can be bendable. Particularly, the middle layer 30 N and the outer layer(s) of the respiratory device can be bendable. In this N application the term “bendable” means that a bendable layer can be bent at = least 10°, typically at least 80°, after which it can be returned to its original N form, without breaking. Preferably, a bendable layer can be bent from a planar x 30 form to a curved form having a radius of curvature of 60 cm, without breaking. S The respiratory device 10 can be a garment or a part of a garment. Further, 3 the respiratory device 10 can be attached to a garment. Further, the respiratory device 10 can be embedded in a garment body 40. The respiratory device having a large surface area can be easily embedded in or attached to a coat or a shirt. Thus, the garment can be, for example, a coat or a shirt.

The respiratory device 10 can be used for outdoor activities, for example for outdoor sports activities. Thus, the respiratory device 10 can be a sport equipment or a part of a sport equipment.

The respiratory device 10 can be a backpack or a part of a backpack. Thus, the respiratory device 10 can be embedded in a bag. Thus, in this case, the respiratory device can be easily carried by the user.

The respiratory device 10 is preferably a passive, i.e. it is not using forced air movement, but it is merely reliant upon wearer's own respiratory action. The air space of the middle layer 30 of the respiratory device 10, together with the large surface area of the outer layer 20 of the respiratory device 10, are improving the easiness of breathing. Thus, breathing through the respiratory device 10 can be easy, even with the passive working principle.

For improving the easiness to use, a grammage of the outer layer 20 can be from 10 to 200 gsm, more preferably from 30 to 180 gsm. In addition, a weight of the body 40 of the respiratory device 10 can be e.g. between 100 g and 400 g. Thus, thanks to the small weight, the respiratory device 10 can be easily carried by the user. The novel respiratory device 10 can be used for cleaning the inhaled air. Furthermore, the respiratory device 10 can be used for conditioning the inhaled — air, particularly temperature of inhaled air.

N N Thanks to the novel respiratory device 10, a user can have a light-weight = device filtering inhaled air. Further, the novel respiratory device 10 can warm N up cold, inhaled air. Furthermore, it can be easy to breathe through the novel I 30 respiratory device 10 having large surface area of the outer layer 20 as well as > non-filtering middle layer 30 having large volume of at least 1.5 L for children S and at least 2 L for adults. > N The invention is not limited solely to the examples presented in Figures and the above description, but it may be modified within the scope of the appended claims.

Claims (15)

Claims:

1. Arespiratory device suitable for cleaning air to be inhaled by a user, wherein the respiratory device (10) comprises a body (40), the body (40) comprising a middle layer (30) and an outer layer (20), wherein - the respiratory device (10) is configured to supply air through the outer layer (20) to the middle layer (30), - the middle layer (30) is preferably bendable, and - the middle layer (30) is able to pass air through and configured to create an air space for the respiratory device (10), characterized in that - the air space of the middle layer (30) is at least 1.5 L, preferably at least 2 L, and - the outer layer (20) is able to pass air through and configured to form cleaned air by removing from the air at least 90%, preferably at least 95%, of particles having a diameter equal to or more than 10 um, and - the outer layer (20) has a surface area of at least 1500 cm?, preferably from 2500 cm? to 5000 cm?, wherein the respiratory device is a passive device which is configured to be reliant upon user's own respiratory action.

2. The respiratory device according to claim 1, wherein the outer layer (20) is configured to remove at least 90% of particles having a diameter of at least 5 um, preferably the outer layer (20) is configured to remove at least 95% of particles having a diameter equal to or more than 2.0 um.

S N 3. The respiratory device according to claim 1 or 2, wherein the middle layer 3 (30) does not significantly participate in filtration by being able to pass through O particles having a diameter egual or less than 50 um, more preferably egual or x 30 less than 100 um.

O 5 4. Therespiratory device according to any of the preceding claims, wherein 3 - a thickness of the outer layer (20) is at least 1 mm and preferably not N more than 4 mm, and/or - a thickness of the middle layer (30) is from 10 mm to 20 mm.

5. The respiratory device according to any of the preceding claims, wherein the middle layer (30) comprises a flexible porous mesh having a mesh size from 8 to 15, the flexible porous mesh preferably comprising polyurethane and/or stainless steel.

6. The respiratory device according to any of the preceding claims, wherein the outer layer (20) comprises microfibers or nanofibers.

7. The respiratory device according to any of the preceding claims, wherein the outer layer (20) comprises activated carbon fibers.

8. The respiratory device according to any of the preceding claims, wherein the air space of the middle layer (30) is at least 2.5L, preferably at least 3 L.

9. The respiratory device according to any of the preceding claims, wherein the respiratory device (10) comprises an air channel (50,51,52) able to guide the cleaned air from the respiratory device (10) to a user.

10. The respiratory device according to claim 9, wherein the respiratory device (10) comprises means for preventing backflow of exhaling air to body (40) of the respiratory device (10).

11. The respiratory device according to any of the preceding claims, wherein the respiratory device (10) comprises a facial mask and/or a mouth insert (60).

N 12. The respiratory device according to any of the preceding claims, wherein N the body (40) of the respiratory device (10) is bendable. 3 O 13. A garment comprising a respiratory device according to the any of the x 30 preceding claims 1 to 12. S 14. A sport eguipment or a backpack comprising a respiratory device according

LO O to the any of the preceding claims 1 to 12.

N

15. A use of a respiratory device according to any of claims 1 to 12, to protect a user of the respiratory device (10) from air pollution.