1000 Mile 1548 Trainer Liner Sock 100% Cotton Imported The 1000 Mile Ultimate Tactel Sock has a Tactel inner layer to wick away moisture from the skin helping to keep the foot dry The combination of fibres and top venting helps to maintain a comfortable temperature, with arch bracing offering additional support Arch braced for extra support Top venting for superior breathability. CONTENT: Outer layer: 54% Cotton, 44% Nylon & 2% Lycra. Inner Layer: 100% TactelCARE: Cut barb with scissors to avoid damage to fabric. Pull on sock carefully to ensure the fitted heel and toe box sit on the foot correctly. Machine wash warm, No Bleach & No Tumble Dry