Thorlos Unisex ECCXM Casual Padded Crew Sock 88% Exclusive THORWICK COOL, 8% nylon, 3% elastic, 1% polyester Made in US Turn Inside Out-Machine Wash-Use Liquid Fabric Softner Padding Level: Thin Cushion Key Benefit: Thorlos Protection = Incredible Comfort Guarantee - Your feet will feel better or your money back! Constructed with THORWICK COOL fibers for superior moisture-wicking for drier, cooler feet Flat knit arch for a better fit, more support and more comfort Low profile toe seam wont rub or irritate feet Padding in the ball and heel specifically engineered for protection and comfort during everyday activities when there is low stress on feet