The Karrimor Merino Fiber Heavyweight Hiking Socks are ideal for trekking and mountaineering, thanks to the heavyweight Merino Wool blend construction with temperature-regulating Coolmax fabric. 45% Merino Wool, 22% Coolmax, 30% Nylon, 3% Lycra Full Terry construction Men's hiking socks 1 pack Coolmax temperature-regulating fabric Comfort fit cuff Flat toe seam Anti-odor antimicrobial odor management Men's shoe sizes 8-12 Machine washable Imported