Darn Tough Vermont Men's Merino Wool Micro-Crew Light Cushion Hiking Socks 40% Merino Wool, 56% Nylon, 4% Lycra Spandex Made in US Half the wool yarn weight of Darn Tough's cushioned socks True Seamless construction provides a smooth performance fit; no slipping, no bunching, and no blisters Constructed from fine guage Merino wool which is naturally antimicrobial and antibacterial Still made in Vermont, USA Still unconditionally guaranteed for life