Mattress

FIG. 1 is a top, perspective view showing of a mattress.

FIG. 2 is a top view of the mattress of FIG. 1 .

FIG. 3 is a front side view of the mattress of FIG. 1 .

FIG. 4 is a rear view of the mattress of FIG. 1 .

FIG. 5 is a right side view of the mattress of FIG. 1 .

FIG. 6 is a left side view of the mattress of FIG. 1 ; and,

FIG. 7 is a bottom view of the mattress of FIG. 1 .

The Dash Dot lines present in the drawings represent symbolic break lines in its length, width, and height and form no part of the claimed design. The appearance of any portion of the article between the break lines forms no part of the claimed design.