Thorlos socks absorb shock and protect feet from impact and blisters with thick cushioning in the ball of foot and heel. The cushioning extends over the toes for maximum protection when you stop and go - great for activities like tennis. Thorlon acrylic fibers, developed exclusively for Thorlos, wick away moisture to keep feet cooler and drier. Contoured heel and toe pockets help eliminate irritation, bunching and slipping. Flat knit at instep offers a better fit. Non-binding top stays up comfortably. Low-profile toe seam wont rub or irritate your toes.