Silicon Grip on the heel to keep them in place all day, keep away from slipping and pains throughout the day from walking.
Material: 35% Bamboo Rayon + 42% Cotton + 21% Polyester + 2% Spandex, as the picture shows, the front part made of bamboo fiber.
Size: one size fit for US Women 6-11(9"-11").
Package included: 3 or 5 pair no shows women socks