Give your foot some support before you stick it in a rigid ski boot. Put on the Icebreaker Women's Skier Liner Over The Calf sock. This lightweight sock liner gives you some breathability as well as support for your Achilles and instep before you put on another lightweight sock and your ski boot. With stretchy Lycra spandex, the Skier Liner retains your foot's natural shape so you ski with more pain free power, while reinforcement in the heel and toe helps prevent blisters and black toenails. A breathable section on the top of the foot reduces foot sweat as you carve up your local hill.