Long backrest car seat

FIG. 1 is a front elevational view of a long backrest car seat showing our new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a left side elevational view thereof; and,

FIG. 5 is a top plan view thereof, the bottom not being visible in normal use.

The broken lines shown in the drawings are for illustrative purposes only and form no part of the claimed design.