Our seat is superior to similar appearing models offered elsewhere. The outside is narrower, greatly increasing clearance inside the car, yet the inside is wide enough for even the largest racer. Our head rest runs straight up - not tilted back - for optimum driver protection. Leg room increases by 1-1/2". Because it sits closer to the floor than competitors' models, head room also increases. This double-wall seat is rotationally molded from premium polyethylene material, with slots provided for a shoulder harness, lap belt and crotch strap. A black, snap-on upholstery cover is included.