The 1000 Mile All Terrain Sock is a sock within a sock. The 100% Tactel inner layer stays with the foot, wicking away moisture, whilst the soft wool cotton mix outer moves with the shoe. The lack of friction between the layers helps to prevent blisters and reduces wear. The unique combination of fibres maintains a comfortable temperature for the foot. Arch braces on both layers help prevent unwanted movement, even on severe slopes. ...