The Karrimor Merino Fiber Lightweight Hiking Socks feature Coolmax construction, designed to regulate body temperature and actively manage moisture. 20% Merino Wool, 54% Coolmax, 23% Nylon, 3% Lycra Men's Hiking Socks 1 Pack Coolmax temperature-regulating fabric Comfort fit leg Half Terry construction Flat toe seam Anti-odor antimicrobial odor management Men's shoe sizes 8-12 Machine washable Imported