Durable, friction-fighting nylon in the toe and heel Ankle and calf support bands for better fit and support Breathable and moisture-wicking Experience warmth without the drawback of sweaty feet with these performance socks. The Performance Sock is a merino wool, stretch nylon and soft acrylic blend. These socks are moisture wicking with a reinforced toe and heel, along with an ankle support band. 62% Acrylic / 21% nylon / 16% Merino wool / 1% spandex Ankle and calf support bands for better fit and support Durable, friction-fighting nylon in the toe and heel Breathable and moisture-wicking Designed for work, yet light for those on the move all day