Backrest

FIG. 1 is a front perspective view of the backrest;

FIG. 2 is a rear perspective view of the backrest of FIG. 1 ;

FIG. 3 is a front view of the backrest of FIG. 1 ;

FIG. 4 is a rear view of the backrest of FIG. 1 ;

FIG. 5 is a left side of the backrest of FIG. 1 ;

FIG. 6 is a right side view of the backrest of FIG. 1 ;

FIG. 7 is a top view of the backrest of FIG. 1 ; and,

FIG. 8 is a bottom view of the backrest of FIG. 1 .

The short-dash broken lines in the figures depict portions of the backrest that form no part of the claimed design. The dash-dot-dash broken lines in the figures represent the boundary of the claimed design and form no part of the claimed design.