Heatuff Women's Performance Sports Hiking Trekking Cushioned Outdoor Recreation Crew Socks PREMIUM SYNTHETIC FIBERS These socks are made of 90% Polyester, 5% Spandex and 5% nylon. -Polyester is Super Breathable, Quick Dry and Wrinkle Resistant. -Spandex features Higher Extensibility and Exceptional Elasticity. -Nylon: Nylon boasts Excellent Abrasion Resistance and Superior Durability. KEY FEATURES: -Medium-heavy Thickness: Appropriate for Athletic Outdoor Activities and Wide Variety of Winter Sports. -Reinforced Heel and Toe: Long Lasting Durability. -Moisture Wicking: Performance Socks With Moisture Wicking Technology. -High Stretch Stay Up Top: Engineered sock top to keep sock from fall during wear without being tight and causing discomfort. -Max Cushioning: Soft and comfortable. Reduce sock and foot pain during sports or daily activity. WASHING INSTRUCTION: -Machine Wash & Hand Wash(suggest using wash bag). Tumble dry or Air dry. -Don't iron. Don't bleach. Don't soak socks in hot water or suds for a long time. -Suggest washing in cold water, these socks will stretch back from the slight shrinkage. AFTER SALE SERVICE: We stand behind our vintage new look hiking full cushioned socks. If these socks don't fit your feet or you are not happy with the socks, just feel free to contact us. Also if there is any problem, we'd love to hear from you.