Darn Tough Micro Crew Ultra-Lightweight Running Socks are a blend of nylon, merino wool and Lycra/Spandex. These socks are available with or without extra cushion. They have arch support, which Darn Tough claims reduces foot fatigue. Darn Tough also claims these socks won’t slip, bunch, or create blisters. They’re built to last with extra durability in the heel, footbed, and outside toes and Darn Tough unconditionally guarantees them for life.
Due to the merino wool, Darn Tough socks should not be machine-washed, but even if you do machine-wash them you retain the lifetime guarantee. It is recommended that you hand wash the socks while inside-out and air dry them.
Customers love these socks for their thin profile and comfiness. They are both warm during the winter and cool during the summer because of the merino wool. Customers love wearing these socks for long runs and hikes. Some users found the top of the sock to be uncomfortably tight around their calves, though.