Darn Tough Men's Merino Wool Hiker Boot Sock Full Cushion Socks Merino Wool, Nylon, Lycra Spandex True Seamless construction provides a smooth performance fit; no slipping, no bunching, and no blisters Constructed from fine gauge Merino wool which is naturally antimicrobial and antibacterial Still made in Vermont, USA Still unconditionally guaranteed for life