Minus33 Merino Wool Expedition Mountaineer Sock 82% Merino Wool, 10% Polyester, 5% Nylon, 3% Spandex Imported QUALITY EXPEDITION SOCKS: 82% Merino Wool. Very warm and comfortable. Machine washable and dryable. Naturally antimicrobial and moisture wicking means no stinky feat. Expedition Mountaineer socks designed for maximum warmth in the harshest environment. CRAFTED TO FIT: Size S - XL in Full-Length style. Full cushioned bottom. 3% Spandex and seamless toe add comfort. 10% Polyester and 5% Nylon add durability. A perfect fit for any cold weather exploration, frigid adventure, or just playing in the park. EXPERIENCED BRAND: Although there are many copy-cats on the market today, Minus33 has been a trusted brand since 2004. IMPORTED: As the legacy of a 100+ year old USA based woolen company, Minus33 knows quality and comfort in Merino Wool. We are committed to bringing you the best Merino Wool products at a reasonable price. TECHNICAL DETAILS: Knit socks 82% Merino Wool, 10% Polyester, 5% Nylon, 3% Spandex. Garment weight size large = 5.6 oz. (159 grams)