MATERIALS: 80% Bamboo Viscose, 17% Polyamide, 3% Elastane Blend. Machine washable. HIGH QUALITY: Made from the highest quality bamboo viscose to last long and keep your feet healthy. Reinforced toes and heels as well as a comfort seam at the toes make our socks as durable and comfortable as possible. HIGH COMFORT: Very comfortable, breathable and lightweight. Feels soft and gentle on your skin. Possesses moisture-wicking and odor-preventing attributes to make you feel better much much longer. FOR ALL WEATHERS AND OCCASIONS: Designed to be neither too thick nor too thin, our crew lenght business casual socks are suitable for all seasons and everyday use at home or the office. SATISFACTION GUARANTEED: If you are not 100% pleased with our products, please simply return them for a full refund. No questions asked!