This Combo unit comes dry with a bumper. As you enter there is an inflatable saftey ramp that keeps your children safe and they hands and knees free from scrapes, it doubles as a safety zone if one of the kids were to roll out of the entry way. Once inside the bounce area is very spacious and clean, to the right of the bounce area you will find the Dual ladders to clinb up to the top of the slide. once on top you can slide down safely to an inflatable bumper which stops your children gently. Then they do it all over again. This 4n1 will keep your children busy.