Kushies Cloth Diapers SamplerKushies Ultra are all-in-one cloth diapers that have a 100 cotton flannel interior and a waterproof exterior made from vinyl coated polyester.The Kushies Classic diapers are fitted/all-in-one diapers. They have an interior and exterior of soft cotton flannel and an inner hidden waterproof barrier made from vinyl coated polyester. The inner and outer flannel makes for a super soft diaper. However because there is flannel on the exterior you may experience wicking if the diaper is not changed soon after wetting or if you have a heavy wetter. You will need a diaper cover for this diaper if you are using it for naptime nighttime or for a heavy wetter.The diaper liners are flushable and fully biodegradable making diaperclean-up easier. All you need to do is tear off a sheet and place theliner flat in the center of the diaper. After the diaper is soileddiscard the diaper liner in the toilet or waste basket. Notrecommended for septic tanks.