Low Pro Alpaca Ankle Sock Low profile design has alpaca terry loops through the entire sock for cushion, comfort and maximum moisture wicking A heel tab keeps the sock in place and prevents rubbing An arch band wraps around the entire sock Heel and toe are reinforced with nylon for increased durability Hypo-allergenic, un-dyed, moisture-wicking, naturally odor-resistant Works well as a slipper sock to keep feet warm in cold weather! Brown & black Made in USA with US grown alpaca by the New England Alpaca Fiber Pool Inc 78% US Alpaca, 20% Recycled nylon, 2% lycra Machine wash & dry Size M (Men’s 6-9 shoe size, women’s 7-9.5 shoe size) Unisex