5% polyester ? COMFORTABLE FABRIC: These hiking socks are made with the perfect blend of 88 %COTTON, 7% RUBBER and 5% POLYESTER fibers for enhanced softness, stretchiness and comfortable wearing experience. Reduces Feet Fatigue and Speed Up Recovery During Hiking or other outdoor activities. ? BREATHABLE and MOISTURE WICKING: These women??s outdoor socks are breathable, moisture and sweat wicking to keep your feet dry and comfortable even with extended wear. ? SUPPORTIVE and ELASTIC: These outdoor socks features an elastic Arch Support for stability and a compression top to securely hold the calf for perfect fit WITHOUT straining your feet. Extra cushioned finish for feet comfort. NO Slipping, NO bunching, and NO blisters. ? GREAT FOR OUTDOOR: These women outdoor athletic socks provide you with the support, protection and much needed foot comfort when Hiking, Walking, Running, Walking, Golf, Mountaineering, Cycling, Backpacking, Traveling, Walking, Mountaineering, Trekker Trekking or all-day wear. ? WASHING and DRYING GUIDE: Machine Wash Cold, Low Tumble Dry, DO Not Bleach, Do Not Dry Clean.