THERMAREST product. A compact and lightweight mattress, convenient for carrying to campsites. It's a regular size, suitable for the size of a man's body. I used it when I went camping, but I haven't used it at all in recent years, so I'm selling it. I've used it several times, and there are a few stains on the back that won't come off. Please check the photos. It might be a good idea to keep it at home as a precaution against disasters such as the Nankai Trough megaquake.