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. – Comfort welt. – Y-heel for superior fit. – Reinforced toe and heel. – Cushioned on shin, sole and ankle. – Anatomically shaped for right and left foot. – Instep protector. Supreme wool comfort: Insulation and temperature regulation. Elastic all over for perfect fitting.