Sparco Hyperspeed Socks are designed for Sim runners who feel more comfortable in socks than racing boots. The socks are nylon microfiber, hypoallergenic and provide maximum comfort and breathability. They present a silicone thread structure to maximize grip between foot and sock, or insole and sock, a comfortable design with a padded insole for maximum sensation. The heels are reinforced with Cordura to give you the best pedaling feel, with a rear heel tab for easy on and asymmetrical plastisol coating for maximum performance.