The design consists of features of shape, configuration and ornamentation of the HAT as shown in the accompanying drawings.Drawings of the design are included in which:Fig. 1 is a perspective view of the HAT;Fig. 2 is a right side elevation view thereof, the left side elevation view being a mirror image thereof;Fig. 3 is a front elevation view thereof;Fig. 4 is a rear elevation view thereof;Fig. 5 is a top plan view thereof;Fig. 6 is a bottom plan view thereof;Fig. 7 is a perspective view of a variant of the HAT of Fig. 1;Fig. 8 is a perspective view of a variant of the HAT of Fig. 1, the top plan view thereof being the same as Fig. 5;Fig. 9 is a right side elevation view of the HAT shown in Fig. 8;Fig. 10 is a left side elevation view of the HAT shown in Fig. 8;Fig. 11 is a front elevation view of the HAT shown in Fig. 8;Fig. 12 is a rear elevation view of the HAT shown in Fig. 8;Fig. 13 is a bottom plan view of the HAT shown in Fig. 8;Fig. 14 is a perspective view of a variant of the HAT shown in Fig. 8;Fig. 15 is a perspective view of a variant of the HAT shown in Fig. 8, the top plan view thereof being the same as that of Fig. 5;Fig. 16 is a right side elevation view of the HAT shown in Fig. 15;Fig. 17 is a left side elevation view of the HAT shown in Fig. 15;Fig. 18 is a front elevation view of the HAT shown in Fig. 15;Fig. 19 is a rear elevation view of the HAT shown in Fig. 15;Fig. 20 is a bottom plan view of the HAT shown in Fig. 15;Fig. 21 is a perspective view of a variant of the HAT shown in Fig. 15;Fig. 22 is a perspective view of a variant of the HAT shown in Fig. 1, the front elevation view, the rear elevation view, and the top plan view thereof are the same as the corresponding drawings of the HAT shown in of Fig. 1;Fig. 23 is a right side elevation view of the HAT shown in Fig. 22, the left side elevation view being a mirror image thereof;Fig. 24 is a bottom plan view of the HAT shown in Fig. 22;Fig. 25 is a perspective view of a variant of the HAT shown in Fig. 22;Fig. 26 is a perspective view of a variant of the HAT shown in Fig. 22, the top plan view, the front elevation view, and the rear elevation view thereof are the same as the corresponding drawings of the HAT shown in Fig. 8;Fig. 27 is a right side elevation view of the HAT shown in Fig. 26;Fig. 28 is a left side elevation view of the HAT shown in Fig. 26;Fig. 29 is a bottom plan view of the HAT shown in Fig. 26;Fig. 30 is a perspective view of a variant of the HAT shown in Fig. 26;Fig. 31 is a perspective view of a variant of the HAT shown in Fig. 26, the rear elevation view, front elevation view, and top plan view thereof are the same as corresponding drawings for the HAT shown in Fig. 15;Fig. 32 is a right side elevation view of the HAT shown in Fig. 31;Fig. 33 is a left side elevation view of the HAT shown in Fig. 31;Fig. 34 is a bottom plan view of the HAT shown in Fig. 31; andFig. 35 is a perspective view of a variant of the HAT shown in Fig. 31.Drawings of the design are included.