This is new born diaper cover with double gussets,fits baby 3-5kg. The outer is PUL, waterproof and breathable. With hook & loop, very easy to open and close. PUL is a kind of polyester interlock with polyurethane laminate, polyurethane is the waterproof layer. The insert will be put on polyurethane layer directly, once there is any solid out of the insert, it is easy to be wiped off. This is why some moms prefer to use covers instead of pocket diaper.