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! COMFORTABLE These seamless, waterproof-breathable socks keep your feet dry and comfortable in wet conditions without adding bulk or sacrificing comfort ? no plastic bag feeling like other waterproof socks. FOUR SIZES: Extra Small Size – fit for US men 5-7 and US women 6-8; Small Size – fit for US men 7.5-9.5 and US women 8.5-11; Medium Size – fit for US men 10-12.5 and US women 11.5-13.5; Large Size – fit for US men 13-15 and US women 14-16. Please refer to images on the left for more detailed size information. NOTE: The Waterproof Socks with the Three-Layer Construction might be A Little Thick to stuff into certain shoes. Please match with Loose Fit shoes. OCCASION??Daily Wear,foot care,especially suitable for outdoor sports and activities of various kind of harsh environments. Suitable for biking,walking and running during warmer seasons when there is a need to keep dry feet. EASY CARE??Hand wash under normal temperature,water temperature should be below 40 degree centigrade if machine wash, do not iron, dry clean or tumble dry but hang to dry after spin-dry in ventilated place. RANDY SUN is specially designed to the men and women who seeks a sleek style and high quality products at a reasonable price.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.