Bridgedale - Men’s Merino Wool Performance Boot Socks 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, 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 PetrolNavy. 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 Socks - Performance Fit - Merino Wool Fibres - Flat Toe Seams - Great For Hiking - Moisture Wicking - 4 Colour Options - All Day Comfort - Elasticated Arch - Advanced Padding System - 3 Sizes Available - Machine Washable