This is a newborn size waterproof cover (2 to 7 kg) which comes with a popper or velcro fastening. The popper fastening covers have a useful umbilical cord snap down. These ultra stretchy waterproof covers are wipeable and therefore reusable. This cover has a single leg gusset and three rows of rise snaps in the front for small, medium and large sizing. Always remember, covers cannot be tumble dried as this damages the waterproofing - there's no need to tumble anyway because they line dry in no time at all. Do not leave in direct sunlight.