The Sunbaby website is pretty low-tech. You can explore for yourself, but basically you have the option of buying either 12 or 24 diapers, with either one or two inserts each. There is a thin, soft microfiber lining and a waterproof pul outer layer. Of course, at this price point, both materials feel slightly thinner than my BG, but so far functionality is similar. The back flap is pretty wide, but so far has not caused an issue. In fact, it makes it easy to stuff with inserts. There is a third snap at the hip, which is apparently new on the Sunbaby, and it has been great for keeping a snug fit around the leg.