Tailored to fit your ski boot. The insulating, thermo-regulating Alpine Sock will keep your feet warm and dry. Elasticated, for a perfect fit, and to minimise the risk of blisters, and with a high calf to prevent blisters due to rubbing against the boot. - Extra protection at instep, and comfortable knitted calf. - Anatomically shaped for left and right foot. - Y-heel for optimum fit. - Reinforced toe and heel for extra wearing strength.