Mouthguard

FIG. 1 is a front view of a mouthguard showing my new design; FIG. 2 is a rear view thereof; FIG. 3 is a top view thereof; FIG. 4 is a bottom view thereof; FIG. 5 is a left side view thereof; FIG. 6 is a right side view thereof; FIG. 7 is another left side view thereof, showing the mouthguard in an alternative configuration; FIG. 8 is another right side view thereof, showing the mouthguard in an alternative configuration; FIG. 9 is an exploded top perspective view thereof, showing the upper and lower parts of the mouthguard being separated; and, FIG. 10 is an exploded bottom perspective view thereof, showing the upper and lower parts of the mouthguard being separated. The dash-dash broken lines in the drawings depict portions of the mouthguard that form no part of the claimed design. The dot-dash broken lines in the drawings denote the boundaries of the claimed design and form no part of the claimed design.