Darn Tough Merino Wool Athletic Socks are a sturdy and comfortable option for on the court, at the gym, or everywhere in between. This sock is light-weight. It is the thinnest of the Darn Tough socks. This sock is meant to cover your foot for a low-profile shoe and nothing more. All Darn Tough socks are made in the USA and backed by Darn Tough's Lifetime Guarantee. Specs: 52% Merino Wool 44% Nylon 4% Lycra Spandex