Made of high-tech material, the seamless, moisture-wicking socks are not only thermal and windproof, but also wear resistant and lightweight. 100% waterproof lightweight membrane doesn't let the external water molecules enter the socks. Please note the cuff of socks isn't waterproof, so don't let water over the top of socks. These waterproof socks are especially applicable for hiking, trekking, camping, fishing, hunting, skiing and other outdoor sports and activities. Quantity of 1000 units or more is subject to ocean freight pricing