I purchased this from Mountain Equipment in Canada about 20 years ago. The material is nylon on the surface and polyester inside. The approximate size is 210cm in length, 80cm in maximum width, and the weight is 1650g. After using it for one night of camping, I have stored it in my apartment. It's warm, so I think it's suitable for camping or sleeping in a car from now on. There is no deterioration of the main body, but the waterproof coating on the storage bag has peeled off due to aging, so it is no longer waterproof.