MATERIAL COMPOSITION:80% Rayon derived from Bamboo-Viscose+17% Polyamide+3% Elastane Composed of naturally Rayon Bamboo which drastically reduce foot odor, Silky fiber allows feet to stay cool in the heat Flat seam design, helps maintain wonderful comfort levels for your feet throughout the day. Wonderful color to keep your day happy and colorful Quality Ensure:Every pair of socks is hand-inspected by our dedicated quality inspection teams.and we provide 30-day no hassle money back ,100% customer satisfied service! FEATURES: Great for any season,match with any shoes & perfect for most activities Elastic cuff prevents socks offand Rayon Bamboo, perfect fit, and comfortable wear. Walk in greater comfort, enjoy the right temperature Avoid moisture WASHING INSTRUCTION: Machine Wash & Hand Wash(suggest using wash bag), tumble dry or Air dry.Rayon Bamboo will be much softer after the first wash. Compares the cotton socks, Rayon Bamboo socks look smaller but they are super stretchable.The fabric is durable and sustains its softness even through multiple washes. SPECIFICATION: 80% Rayon derived from Bamboo +17% Polyamide+3 Elastane Size: suitable for women US sock size 3-7 8-11 Color: Black,Grey,White AFTER SALE SERVICE: Every pair of socks is hand-inspected by our dedicated quality inspection teams.and we provide 30-day no hassle money back ,100% customer satisfied service!