Features both 100g Thinsulate and a full fleece lining to keep the cold out in the most frigid temperatures. Total style, warmth, and comfort await you when you put on the SOREL Tivoli II boot by Sorel. Traditional lacing with D-ring hardware for a secure fit. Waterproof breathable membrane construction keeps out the wet elements. Waterproof suede leather or waterproof knit upper.