Seirus Innovation Neosock
The Neosock is ultra warm, comfortable, breathable and durable without excessive bulk. Patented technology offers the comfort of 4 -way stretch and warmth of neoprene. Breathable Macro-porous technology seals in the heat and provides dryer warmth without a damp, clammy feeling. This sock is constructed with seams, so it is not fully waterproof. Size Chart: SM: Mens 4 - 5, Womens 4 - 6.5 MD: Mens 46 - 8.5, Womens 7 - 9 LG: Mens 9 - 11.5, Womens 9.5 - 12 XL: Mens 11.5 - 13