Great runs start from the ground up, so outfit your feet with the Thorlo Cushioned Heel Micro Mini Run Sock. This sock features sculpted pads in the ball and heel of the foot for extra cushioning and an Achilles tendon pad to protect against chafing. The lightweight frame and mesh make this a breathable experience. 66% CoolMax®/20% nylon/13% polyester/1% elastic. Made in USA.