1000 Mile Double Layer Ultimate Tactel® Trainer Liner Anti Blister Sock The 1000 Mile Tactel® Trainer Sock is a double layer sock knitted in a shorter style for those who prefer their socks not to be seen.This Double Layer Sock is designed using a Tactel® inner layer not only to help protect against friction on the skin but also to wick away moisture, helping to keep the foot feeling cool and dry.The combination of fibres and top venting helps to maintain a comfortable temperature, with arch bracing offering additional support.Covered by the 1000 Mile unique BLISTER-FREE GUARANTEE – Double layer construction helps to eliminate friction between the foot and shoe, reducing wear and helping to prevent blisters.Tactel® Trainer Sock is shaped to mirror the edge of a trainer style shoe the slightly higher tab at the back protects the ankle from rubbing whilst the addition of our unique Heel Power technology stops the socks from slipping down. The heel power elastic band around the heel section lightly grips the heel to keep the sock in place on the foot.SIZING Ladies S = UK3-5.5, Ladies M = UK6-8.5 Choose the same size sock as your foot size. If you have narrow feet or are on the border between sizes, you should go down a size. The sock should be a snug fit with no wrinkles. Pull the sock on carefully to ensure fitted heel and toe box sit correctly on the foot.