*WATERPROOF & BREATHABLE: 100% waterproof lightweight PU membrane prevents the external water molecules from entering the socks. RANDY SUN waterproof socks are designed with breathable membrane and COOLMAX fabric to wick sweat away from your skin, thus keeping feet cool and dry during sports and exercise*PERFORMANCE COMFORT FIT: Smooth toe seam eliminates bulky seams to reduce abrasion and provide extra blister protection. Deep heel cup style with full wrap prevents your socks slipping into boots or shoes. Ultra-light cushion sole provides comfort and great fit. Non slip ribbed top keeps the sock stay in place*OCCASION: Made of 100% high-tech material, the seamless, moisture-wicking socks are not only thermal and windproof, but also wear resistant and lightweight. These knee high waterproof socks encase both of your feet and calf, are especially applicable for skiing, snowboard, hunting, fishing, also can be used as hiking, hiking, backpacking, trekking, camping, trail running, mountain biking, and other outdoor sports and activities gear, even in various harsh environments*MATERIAL: Outer - 61% nylon, 32% polyester, 7% elastane; Interlayer - a high performance lightweight function of 100% PU waterproof and breathable membrane; Lining - 66% coolmax, 30% polyester, 4% elastane