Outer: 61% high waterproof nylon, 32% polyester, 7% elastane;Interlayer: a high performance lightweight function of waterproof and breathable membrane, Lining: 66% coolmax, 30% polyester,4% elastane ?RANDY SUN is specially designed to the men, women, youth, boys and girls who seeks a sleek style and high quality products at a reasonable price. We devote to designed and developed in Waterproof,Windproof hiking and trekking,skiing,socks.We take great pride in the quality of our products and the fact that it can be purchased at a price that makes everybody satisfied. RANDY SUN is not the cheapest,but it is the best! NOTE & SIZE: Take note that our Waterproof Breathable Skiing Socks with a Three-Layer Construction might be A Little Thick to stuff into some shoes. Please match with Loose Fit Shoes. THREE SIZES (UNISEX): Small (US Men 7.5-9.5, US Women 8.5-11); Medium (US Men 10-12.5, US Women 11.5-13.5); Large (US Men 13-15, US Women 14-16). Refer to images on the left for more detailed size information. Tube length (from the heel to the top) of Size L: 15.75 in (40cm). Premium Waterproof Breathable Socks designed with a three-layer construction, which handily solves the contradiction between waterproofing and breathing property. Outer layer: 61% high waterproof nylon, 32% polyester, 7% elastane; Inter layer: a high performance lightweight function of waterproof and breathable membrane; Lining: 66% coolmax, 30% polyester,4% elastane. SUITABLE OCCASIONS: 1)Ultra-light cushion sole provides great comfort and fit, keeping your feet cool and dry during walking, running, cycling or gardening in warm seasons. 2)Perfect windproof and water resistant socks for outdoor activities in harsh environment with mud and water all over the place: trekking, hiking, mountain biking, fishing, hunting and exploring. 3)Also Fit for many snow and water sports: skating, skiing, ice rock climbing, snow fights, ice golf, ice archery and surfing. PERFORMANCE: 1)Superior wear-resisting waterproof socks with high elasticity and decent thickness. 2)Ensure the high performance of thermal comfort. 3)Keep your feet cool and dry all day long. 4)Soft Cushioning: Reinforced heel and toe assures your feet long-lasting comfort. 5)Great gift to your family and friends on Christmas Day, New Year or their birthday. WASH & CARE: Hand wash under normal temperature; if washed by machine, the water temperature should be below 40 centigrade. Do not iron, dry clean or tumble dry. Hang in ventilated place to air dry after spin-drying. No distortion or color fading after multiple washings.