Each Angelcare refill cassette includes multi-layered barrier bags that keep bad smells at bay. It is easy to use with one hand and has a capacity of approximately 28 nappies (size 2). Each refill cassette will last up to 1 month and seals up to 180 nappies, depending on size. The nappy bags use less plastic (in weight) than other competitive systems. This set contains three refill cassettes for the Angelcare nappy disposal system.