The ornamental design for a footrest for carseat, as shown and described.
FIG. 1 is a perspective view of a footrest for carseat showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a right side elevational view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof;
FIG. 8 is a right side elevational view of the footrest for carseat shown in an environment of use; and,
FIG. 9 is another right side elevational view of the footrest for carseat in an environment of use wherein the footrest components are assembled in an alternate configuration, with the footplate portion attached to the top of the poles and other elements attached to the center of the poles.
The broken lines depict unclaimed subject matter only and form no part of the claimed design.