Darn Tough Socks are made in the USA. Vermont is a fantastic place to test their products. Vermont offers skiing, snowboarding, hiking, biking, and running. Because of the availability of these activities, Darn Tough Socks are able to test their socks under any of these conditions. Darn Tough Socks offer features that makes a customer coming back for more. Darn Tough Socks have high density knitting, performance fit, Merino wool, Coolmax®, full cushion, ultra-light, open knit mesh construction, ribbed knitting, ribbed ankle support, and elastic arch support to name just a few. Look for these popular socks: Darn Tough Merino Wool Hiking Full Cushion Boot Sock. Darn Tough Merino Wool Run-Bike Cushion Quarter Sock. Darn Tough Merino Wool Over The Calf Ultra Light Ski Sock.