Foot Sleeping Bag - Fußschlaf - Taffeta quilting has been used in various products, taking advantage of its cushioning, heat retention, and lightweight properties. This product, Fußschlaf (Foot Sleeping Bag), utilizes these characteristics to provide a warm and fluffy feel, just like putting your feet into a sleeping bag. *Weighing only 80 grams per foot, you can use them as if you were barefoot, without feeling any discomfort.* *The included carrying bag makes it easy to carry, making them convenient as portable slippers.* M Size: Suitable size (approx. 22cm - 23.5cm) Length of instep/approx. 13.7cm I bought a set for the family, but I'm selling the M size red ones because I didn't use them. There is a dent on the sole in one place due to being compressed during storage, as shown in the 6th photo. Thank you for looking.