Sealskinz Unisex Waterproof Mid Length Socks Introducing our Waterproof All Weather Mid Length Sock. Designed for versatile use in any weather, these socks are 100% waterproof, windproof, and breathable. We ve revolutionized waterproof technology with our unique hydrophilic membrane. This membrane keeps your feet dry and cool by pulling moisture away from your skin at a molecular level. Even under the toughest conditions, with a Hydrostatic Head of 20,000mm, our socks remain reliably waterproof. Available in BlackGrey Marl, GreyGrey Marl, and Navy BlueGrey Marl. Crafted with premium materials, our socks are constructed by bonding three layers together. The outer layer consists of 62% Polycolon, 29% Nylon, and 9% Elastane. The middle layer features a 100% Hydrophilic Membrane, while the inner layer comprises 36% Merino Wool, 36% Acrylic, 18% Polyester, 5% Nylon, and 5% Elastane. We value simplicity, and caring for our socks is effortless. Wash at 40ºC105ºF, low tumble dry or drip dry. Avoid dry cleaning, ironing, and bleaching. Experience unmatched comfort and performance with our Waterproof All Weather Mid Length Sock. Extra Product Details 100% waterproof, windproof and breathable - Keeps you dry and cool simultaneously - Hydrophilic membrane pulls moisture away from skin - Premium materials and three-layer construction - Easy care - machine washable - No need to re-waterproof - Unmatched comfort and performance