Product description: This product has a wide field of fleece on the feet. Wider than before, the leg is more comfortable and relaxed for your feet. It is very useful for people who often use sleeping bags in a car, etc. You can also use it as a cushion or pillow when storing it in a sleeping bag. This is a handy 3-in-1 item that has never been before. Put it in a sleeping bag to warm your feet. It can also be used as a sleeping bag storage bag. Can also be used as a cushion during storage. Recommended for those who like this. People who use sleeping bags for sleeping in a car, have bought it for disaster prevention, but once you leave it out, it is troublesome to put it in a traditional bag.