Peter Storm Merino Socks are heavyweight, fully cushioned socks built for hill walking and mountaineering.Their high content of top-quality Merino Wool makes them very comfortable all day, minimising the build-up of bacteria and enhancing wicking performance.Naturally antibacterial and moisture-wickingFabrics: 56% Merino Wool, 36% Acrylic, 8% PolyesterS = UK shoe size 3-5M = UK shoe size 5-8