Thorlos Unisex J Running Thick Padded Rolltop Sock, White (3 Pack), Large 84% Thor-Lon Acrylic, 15% Nylon, 1% Elastic Made in US Turn Inside Out-Machine Wash-Use Liquid Fabric Softner The ORIGINAL padded high perfomance sock [Patent Number 4194249]. Often copied but never duplicated. MADE in the USA. Padding Level: Thick Cushion. Key Benefit: Maximum Protection = Maximum Comfort | Designed for feet that hurt (so they won't hurt anymore). For enjoying short intense runs or going long distances on all terrains, in most weather conditions resulting in moderate to significant stress on the foot. Roll top on back of heel to assure they stay up. Constructed with THORLON fibers for superior softness, resilience, durability, and moisture-wicking for drier, better feeling feet. Padding extends over the toes for more protection against fast stops and lateral movement. Flat knit instep and cushioning in arch for better fit, more support and less pressure on the feet for a more comfort. Proudly MADE in the USA | North Carolina. Thorlos Brand Promise Guarantee - Your feet will feel better or your money back!