Australian Superfine Merino Wool & Extra Long Staple Peruvian Pima Cotton Soft, Anti-Itch, Luxurious Hand 40% Superfine Merino Wool, 40% Peruvian Pima Cotton, 18% Nylon, 2% Spandex 176 Needle Lightweight Construction Moisture Wicking Antimicrobial - Minimizes Foot Odor Extra Tensile Strength for Durability Boot Length ( Shorter than Over the Calf, Taller than Anklet - Perfect for Every Boot) One Size Fits Most