Keep your feet warm and dry this cold season with the ultimate foot gear. These ultra warm socks are made using the highest quality USA grown alpaca fiber. As one of the most sustainable natural fibers in the world, alpaca fiber is known for its luxurious soft feel, and is used to make clothing and textiles which are hypoallergenic, high performing, moisture resistant, temperature regulating, and durable. SPECIFICATIONS Choose from Small, Medium, and Large sizes. 78% Alpaca, 20% Nylon, 2% Lycra Made in the USA. Gentle machine wash & dry inside out. Use warm water and tumble dry low. Do not iron or dry clean.