The Survival Sock is a terry loop lined mid-weight sock designed for a wide range of outdoor activities and climates. The soft alpaca terry loops are combined with a durable nylon outer shell. Reinforced foot arch band and a ribbed knit ankle support ensure a proper fit every time. This warm and comfortable sock is one of our best selling styles! Hypo-allergenic, dyed and un-dyed, and odor resistant. Made in Massachusetts by the New England Alpaca Fiber Pool. Contents: 78% U.S. Alpaca, 20% Nylon, and 2% Lycra. Care Instructions: Machine Wash and Dry, See Label