Size Chart Natural fibers and advanced compression technology come together in these women's socks. Get both the comfort of Merino wool and the many benefits of CEP's trademark compression, which include improved performance, increased circulation, and injury prevention. Features: - Encircles your muscles more than 300 times in graduated compression - Wool-blended, anatomically padded cushioning, anti-blister, anti-hotspot - Seamless toe-closure for maximum comfort - Merino wool and synthetic fibers provide thermal regulation and proven compression - 55% Polyamide (Nylon), 17% Merino Wool, 15% Elastane, 13% Polypropylene - 20-30 mmHg graduated compression - Low-maintenance ownership - machine wash and dry