IDIFU Women's Warm Winter Fur Lined Lace Up Flat Snow Ankle Booties This pair of snow boots has fur lined inside, which is very soft and warm in this cold. The heel is approximately 1.5 inch and the shaft is about 7.1 inch, which is very safe. The flat lug sole is of high quality, which is non slip and durable. It will never let you down. No matter how long you wear it, you will like it very much since it's very breathable and cosy. In this fall and coming winter, one pair of warm snow boots is a must for you.