Socks that help you get to the Pinnacle! Darn Tough Men's Pinnacle Crew Socks 1975 are made from a blend of fibers including merino wool, known for its wicking and antimicrobial qualities, and knit with a fine gauge to make the socks very durable. The performance fit means no slipping, bunching, or blisters. The socks are built light, with undetectable seams, but they should last for years. In fact, Darn Tough offers an unconditional guarantee for life!