Most socks can either offer padding for protection and comfort, or two layers for reduced friction. Padded socks are thick, double layer socks are thin. The 1000 Mile Fusion Sock breaks that mould with innovative design and material technology to provide a sock that offers everything.This sock features full padded Achilles tendon protection, the first sock to do this. There is also arch bracing that gives additional support and extra padding for toe, ball and heel zones.The double layer construction eliminates friction between the foot and shoe, reducing wear and preventing blisters, while the Tactel inner layer wicks away perspiration to keep feet dry and cool.Content: *Outer layer: 57% Nylon, 41% Tactel, 2% Spandex. *Inner Layer: 100% TactelFit Guidance: Cut barb with scissors to avoid damage to fabric. Pull sock on carefully to ensure the fitted heel and toe box sit on the foot correctly.