World's Softest Men's and Women's Quarter Socks Ultra soft acrylic creates plush softness that wicks away moisture; Durable nylon adds stretch for long-lasting fit Low-profile toe seam helps prevent irritation; Cushioned tops stay in place without binding High stress heel and toe areas are reinforced for longer wear Helps relieve Cold Feet 75% Acrylic, 23% Nylon, 1% Polyester, 1% spandex; machine-washable; Made in USA