Sealskinz Worstead Waterproof Cold Weather Knee Length Socks - Black / Medium

The original, knee length military-trusted Worstead sock. Thermal and waterproof, the Worstead thrives in a range of environments. The Aquasealz™ hydrophilic membrane releases internal heat and moisture, simultaneously denying the intrusion of external elements. Handcrafted in the Sealskinz factory in Norfolk. Features Outer - Extra-durable Polycolon exterior, with 4-way stretch for an optimal fit.. Mid-Section - Aquasealz™ 100% waterproof hydrophilic membrane releases moisture vapour from inside the. sock.. Interior - Premium merino wool, with terry-loop knitting for extra comfort and sweat-wicking.. A seamless construction, with elastic support on the ankle, providing a close fit.. Materials Handmade and hand tested in Sealskinz Norfolk factory. Socks have undergone an in-depth testing process, demanding waterproofness and durability of fabric. Outer Layer - 90% Nylon, 10% Elastane. Middle Layer - Aquasealz® waterproof membrane. Inner Layer - 35% Merino Wool, 35% Acrylic, 23% Polyest