PEDS Women's Classic Solid and Patterned Dress Crew Socks, 4 Pairs, Black, Shoe Size/5-10 Black: 78% Rayon, 19% Polyester, 3% Lycra Spandex; Black: 77% Rayon, 20% Polyester, 2% Lycra Spandex, 1% Nylon; Black Marl: 77% Rayon, 20% Polyester, 2% Lycra Spandex, 1% Nylon; Black Lacy: 74% Rayon, 23% Polyester, 3% Lycra Spandex Imported Machine Wash Lycra fiber offers the ultimate in comfort and fit Constructed with rayon for extreme softness 4 pair pack Satisfaction guarantee-if you are not completely satisfied with your PEDS product, simply return them to us for replacement