These comfortable, casual socks offer a relaxing reprieve for the outdoor enthusiast, athlete or active individual. Great styles, colors, fabrics and linings punctuate the Muk Luks line and are sure to offer a powerful presentation. 100% acrylic with a non-slip sole. This 4 pair sock pack consists of one pair in each color: Black, Steel Grey, Bark, and Loden. Made in China. Material: Denier Polyester, Spandex, Rubber.