Thorlos Experia Unisex XCXU Multi-Sport Thin Padded Crew Sock 74% Thor-Wick COOL polyester/14% Polyester/10% Nylon/2% Elastic Made in US Turn Inside Out-Machine Wash-Use Liquid Fabric Softner Sculpted thorlo pads in ball and heel provide protection form shear and impact in critical strike or impact zones Achilles tendon pad protects against rubbing and chafing Coolmax provides enhanced moisture management Mesh polyester allows for maximum breathability