Wigwam Men's Merino Trailblaze Pro Socks 39% Dri-Release, 30% Merino Wool, 29% Nylon, 2% Polyester Made in US Machine Wash Lightweight Merino Wool hiking/outdoor crew socks enhanced with Drirelease with Tencel for superior moisture control and dry feet Merino wool for softness and warmth Drirelease with Tencel keeps feet dry and blister free Cushion sole and seamless toe closure enhances comfort Lifetime Guarantee