Originally named the Trekker, this sock changed the expectations of a hiking sock forever. Engineered advanced zonal padding system for support and comfort this is the ultimate sock for long or multi day expeditions.Merino Performance Fusion Technology provides resilient padding, balanced insulation, moisture wicking and outstanding durability for all day comfort. Merino wool is also well known to be some of the softest material out there, guaranteeing maximum 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._These socks are made from 38% Nylon / Polyamide, 26% Wool, 18% Merino Wool, 17% Endurofil/ Polypropylene, 1% Lycra / Elastane and come in 4 different colours: Black, Green, Gunmetal and Petrol/Navy. They come in 3 sizes: Medium (6-8.5 UK), Large (9-11.5 UK), X-Large (12+ UK) and are Machine Washable._Extra Product Details_Bridgedale Men's Boot SocksPerformance FitMerino Wool FibresFlat Toe SeamsGreat For HikingMoisture Wicking4 Colour OptionsAll Day ComfortElasticated ArchAdvanced Padding System3 Sizes AvailableMachine Washable