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! lace-up closure SUITABLE OCCASIONS: Perfect Military Personnel Socks especially for the military training. One of the top Skiing Socks choices for snow sports enthusiasts. Well suited for all sorts of Snow Sports like Skiing, Skating, Ice Rock Climbing, Snow Fights, Ice Golf, Ice Archery, etc. Great Mud Sports Socks & Outdoor Sports Socks for hazardous outdoor activities with mud and water all over the place, such as Trekking, Hiking, Mountain Biking, Fishing, Hunting and Exploring. Mid weight, knee length sock, perfect for a multitude of activities & conditions. 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). 100% Waterproof,100% Inspection and 100% Seamless – Offering the perfect balance of warmth and breathability. Elasticated Ankle and Insteps offer support and a comfortable fit; exclusive multi-layer moisture elimination system keep feet dry.