A sock for serious adventurers, the Explorer Merino Endurance Knee helps you tackle the world's most extreme environments in comfort. 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 no matter how long the day. 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 37% Merino Wool, 29% Nylon / Polyamide, 19% Endurofil/ Polypropylene, 14% Wool, 1% Elastane and come in 2 different colours: Black or Olive. 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 FibresKnee High LengthFlat Toe SeamsPerformance FitGreat For The OutdoorsMoisture WickingDesigned For Cold EnvironmentsShock ZonesElasticated ArchAvailable In Black Or Olive3 Sizes AvailableMachine Washable