FIG. 1 is an upper perspective view of a helmet according to a first embodiment;
FIG. 2 is an lower perspective view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a rear view thereof;
FIG. 5 is a side view thereof;
FIG. 6 is a side view thereof;
FIG. 7 is a top view thereof;
FIG. 8 is a bottom view thereof;
FIG. 9 is a cross-sectional view taken from line 9 in FIG. 3 thereof;
FIG. 10 is an upper perspective view of a helmet according to a second embodiment;
FIG. 11 is an lower perspective view thereof;
FIG. 12 is a front view thereof;
FIG. 13 is a rear view thereof;
FIG. 14 is a side view thereof;
FIG. 15 is a side view thereof;
FIG. 16 is a top view thereof;
FIG. 17 is a bottom view thereof; and,
FIG. 18 is a cross-sectional view taken from line 18 in FIG. 12 thereof.
The broken lines define portions of the helmet that form no part of the claimed design.