A sock for serious adventurers, the Explorer Merino Endurance Boot Sock sits at an ideal height for boots with an extended ankle cuff. Featuring cushioning throughout for warmth and engineered advanced zonal padding system for support and comfort, this is the ultimate sock for long or multi day high mountain and winter expeditions.Merino Performance Fusion Technology provides resilient padding, balanced insulation, moisture wicking and outstanding durability for all day comfort. Merino Wool is also known as a very soft material which ensures ultimate comfort.Tested by Explorers in the coldest, most extreme places on this planet, this sock delivers more comfort and warmth than any other Bridgedale sock and is the ideal choice for cold-weather expeditions._These socks are made from 28% Merino Wool, 34% Nylon / Polyamide, 19% Wool, 18% Endurofil/ Polypropylene, 1% Elastane and come in 3 different colours: Black, Olive or 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 Outdoor SocksMerino Wool FibresCrew Boot LengthFlat Toe SeamsPerformance FitGreat For The OutdoorsMoisture WickingDesigned For Cold EnvironmentsShock ZonesElasticated ArchAvailable In Black, Olive & Navy3 Sizes AvailableMachine Washable