The Flite XT Trail is the most technologically advanced sock ever engineered 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. Mid-Crew height for enhanced coverage. Natural Merino wool and Olefin footbed keep your feet dry and blister-free, whatever the conditions AnkleLock(TM) Technology featuring targeted ankle and heel support provides protection during quick movement Proprietary GripDry(TM) fiber in the heel and forefoot grips shoes to keep feet stable Arch band support maintains shape, keeps sock in place and gently supports arch Mid-Crew cuff height supports ankles and lower calf muscles Machine wash cold, tumble dry low, do not bleach or iron 38% Nylon / 24% Merino wool / 22% Olefin / 13% Polyester / 3% Spandex