The Bircham is the original, military-endorsed Sealskinz sock in ankle length. It is 100% waterproof and thermoregulating, so it works for high-intensity sport and relaxed days outdoors alike.
It is handcrafted in the Sealskinz factory in Norfolk.
Three-layer construction
Layer
Material
Outer
62% polycolon, 29% nylon, 9% elastane: extra-durable with 4-way stretch
Middle
Aquasealz waterproof membrane that releases moisture vapour
