Sorel Women's Caribou Thermoplus Winter Boot Liners - Keep wearing your favorite pair of Sorel Caribou boots with a simple liner replacement. This inner boot is designed to wick moisture away from your feet. 9mm washable recycled felt liners Reinforced seams and heel area for exceptional durability Breathable Radientex thermal reflective membrane keeps heat in and cold out Stretch front shaft ensures comfortable fit and seals cold air out Style: 106369