Thorlos Experia Unisex XWXU Multi-Sport Thin Padded Crew Sock 35% Merino Wool/31% Polyester/19% Nylon/14% Silk/1% Elastic Made in US Turn Inside Out-Machine Wash-Use Liquid Fabric Softner Specially sculpted THORLO pads in the ball and heel provide protection from shear and impact where needed Lightweight Achilles Tendon pad protects against rubbing and chafing