Darn Tough Merino Wool Classic Stripe Mid-Calf Sock - Men's Synthetic Versatile to the core, these socks go way beyond the expectations of an everyday sock True Seamless construction makes them irresistibly comfortable Fine gauge Merino wool is antimicrobial and breathable in case you need to squeeze and extra day (or two) out of your socks Still made in Vermont, USA Unconditionally guaranteed for life