Conventional sock wisdom dictates that you can either have 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 mold with innovative design and material technology to provide a sock that offers everything:BLISTER FREE GUARANTEE, together with padded comfort and protection. Full padded Achilles tendon protection – the first sock to offer you this! Arch bracing gives additional support Extra padding for toe, ball and heel zones Double layer construction eliminates friction between the foot and shoe, reducing wear and preventing blisters Tactel® inner layer wicks away perspiration to keep feet dry and cool Black colour option designed to be higher in the leg for winter running