The basic wet bag, comes in small and large sizes both are available in 4 cute prints. The small bag holds 6 diapers and is designed for short outings. The large holds 10 diapers for longer outings/daycare. It is designed to be washed at high temperatures, so you can wash it with your diapers. The diaper bag has a pull top and is designed to have some airflow to prevent the build-up of smelly bacteria.