Thick weight, mid length waterproof sock (thicker than the Hiking Sock) perfect for a multitude of activities and conditions where added insulation is imperative, particularly long distance walking in damp and cold conditions. Constructed with "Stretchdry" waterproof, breathable and windproof technology. Thick weight sock providing warmth in the coldest of conditions. Thicker Merino wool lining for moisture control and comfort. Elasticated ankle and instep offers additional support. Y-gore heel construction provides a secure comfortable fit. Padded heel, toe and footbed absorb shock and guard against pressure and friction, reducing the risk of blistering. Hand linked toe closure, creates a flat seam to prevent rubbing. Outer: 90% Nylon, 10% Elastane. Hydrophilic Membrane Inner: 42% Merino wool/42% Acrylic/ 14% Polyester/ 2% elastane.