Outer Layer: 61%nylon, 32%polyester, 7%elastane; Interlayer: 100%PU waterproof and breathable membrane; lining: 66%coolmax, 30%polyester, 4%elastaneSIZE CHART: Small Size- fits for US Shoe Size men 7-9 and women 8-10.5; Medium Size- fits for US Shoe Size men 9.5-12 and women 11-13; Large Size- fits for US Shoe Size men 12.5-14.5 and women 13.5-15.5. Each pair of our lightweight waterproof socks is individually packed in a delicate drawstring bag for easy carrying.WATERPROOF & BREATHABLE??Three layers design ensures the waterproof and breathable characteristic of our socks. Comfortable and skin friendly inner layer, keep your feet soft and warm; waterproof and breathable membrane, effectively prevent moisture from entering and the breathable material has perspiration absorption, can effectively volatilize sweat; durable and quick-drying outer layer, keep you feet dry and thermal.EXQUISITE DETAILS: Cushioned at heels and toes, function yarn offering amazing shock absorption and guard against pressure and friction. Elastic cuff efficiently prevents your socks sliding down. Reinforced heal construction and seamless toe use thicker yarns for extra durability and comfort in high-wear areas, prevent blisters and provide sports support. Lightweight material keeps your feet warm but doesn’t make your feet bulky when you move.BEST USE: You can wear these sports waterproof socks to take part in any outdoor activity such as camping, kayaking, trekking, exploring, gardening, yard work, rainy days, working outdoors, general outdoors, hiking, spelunking, ice fishing, hunting, trail running, cycling, winter skiing, skating and snowboarding. Our thin waterproof socks will be your best choice in wet weather or outdoor sports. Also easy matching for most of your daily wearing.WONDERFUL GIFTS: Our waterproof hiking socks are good gifts choice, fit for graduation gifts, gift for men, gift for women, gifts for friends. Windproof and waterproof socks are suitable for wet place, especially for the people who work outdoor, beathable waterproof socks is a very thoughtful gift, they will love this warm and lightweight socks! If you have any problem or issue, feel free to contact us and we will do our best to help you!