Engineered advanced zonal padding system for support and comfort this is the ultimate sock for long or multiday expeditions. Merino Performance Fusion Technology provides resilient padding, balanced insulation, moisture wicking and outstanding durability for all day comfort. The Performance Fit is close and supportive and won’t slip down or bunch in your footwear. The Flat Toe Seam minimises bulk that could cause irritation in the toe box and the sock is kept securely in place with an Elasticated Arch and 3D-shaped heel cup.