These are non-woven fabrics cooler bags with inner pearl wool and aluminum coating layers. A cooler bag can always give you a lot of convenience when you go travel, go hiking or go for camping. They can keep seafood fresh, keep beer cold, do medical cooling and do other temporary cold storage and will be very good promotional gifts. Your custom logo can be silk screen on the surface of the bag. All sizes and colors are available. And we also offer other kinds of non woven fabric cooler bags.medical cooling and other temporary cold storage. Your logo can be printed on the surface of the bag.