Lorpen TriLayer Light Hiker Men's Lorpen Men's Tri-Layer Light Hiker Crew Socks are A1 quality socks, perfect for hiking and walking, the Lorpen light hiker socks areTri-Layer socks made with Tencel, the fibre of the future: eco-friendly and economical. Features 3-layer sock: 1. Hydrophobic (non-absorbent) Coolmax polyester inside layer: Wicks sweat away from your feet without absorbing it, keeping your feet dry 2. Hydrophilic natural absorbent middle layer: Tencel natural fibre absorbs your sweat from the inside and sends it to the outside of the sock where it evaporates more quickly over a larger surface area 3. Nylon outer layer: The 'tough guy' of the fibre world, nylon is highly resistant to abrasion and is located in the high friction areas of the sock The advantages of the 3 layers: A dry foot reduces the chance of irritation that can be caused by hours of physical effort Helps regulate temperature, reducing the chance of 'hot foot' Incidence of bacteria is minimised because the sock stays drier on your foot LifeFit fit elements: Lycra throughout the sock avoids the slipping and bagging out that can happen with a sock over time Multi-density knit provides optimum cushioning and superior fit The mesh instep minimises bulk on the top of the foot and promotes heat and moisture release The flat knit toe seam avoids any irritation Content 36% Tencel, 35% Coolmax, 18% Nylon, 10% Lycra, 1% Modal Size Guide Medium fits UK 5.5-8.5 Large fits UK 9-11 Xtra Large fits UK 11.5-15