"Built for stalking prey, hunting from a blind, or sitting in a treestand in freezing conditions, the Hollow Alpaca Hunt Over-The-Calf Socks for Men deliver the warmth needed for comfortable winter hunts. A premium blend of soft Peruvian alpaca fibers provides 3 times the warmth of wool in temperatures from -20F to 40F for up to 12 hours. Moisture-wicking performance and breathable mesh combine for dry comfort and air circulation. Extended Achilles padding add comfort while your on the move, and plush 3"" x 1"" ribbed arches provide support. Made of 49% alpaca fibers/48% stretch nylon/3% elastane. 15"" long cuffs. Men's Sizes: M (6-9), L (9.5-12, XL (12.5-15). Machine wash.Manufacturer style #: HOLLOW-HUNT-OTC. 49% alpaca fibers/48% stretch nylon/3% elastane 3 times the warmth of wool For temperatures from -20F to 40F Moisture-wicking performance Breathable mesh on tops of feet Plush arch support Achilles padding"