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

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 â Extra-durable Polycolon exterior, with 4-way stretch for an optimal fit.. Mid-Section â Aquasealz⢠100% waterproof hydrophilic membrane releases moisture vapour from inside the. sock.. Interior â 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, 2