Swiftwick Flite XT Trail Quarter Crew Socks The Flite XT Trail is a technologically advanced sock for hiking and trail runs offering a blend of natural Merino wool with Olefin fiber for moisture-wicking temperature regulation and stability on any terrain. Features Natural Merino wool and Olefin footbed keep your feet dry and blister-free whatever the conditions Ankle Lock Technology featuring targeted ankle and heel support provides protection during quick movement Proprietary Grip Dry fiber in the heel and forefoot grips shoes to keep feet stable38% Nylon / 24% Merino wool / 22% Olefin / 13% Polyester / 3% Spandex Machine wash cold. Tumble dry low. Do not bleach or iron | Swiftwick | Flite Xt Trail Quarter Crew Socks | Size Small In Coal Sunset Mountain | Nylon