SmartWool Ski Light Socks - Lightweight, Merino Wool Polar Purple Medium 55% merino wool, 43% nylon, 2% elastane or, 56% merino wool, 42% nylon Made from itch-free merino wool that is temperature regulating, moisture wicking, and odor resistant blended with durable nylon and stretchy spandex Rib-knit cuffs Non-bulk back panel Elastic ankle and arch brace provide performance fit Cushioned shin and foot help protect against shock, blisters and abrasion