Pumping the air easily via a pump into the mattress. If you slip off that does not matter. Nothing zwischt out prematurely. Since I was already surprised the first time. Air was fast there and the mattress was slipping on the floor. One can super sleep comfortably on it and if you're an adult, you can do other things ... the part keeps everything out, I do not even have to re-inflation.
Release air is also very fast and flowing. Easy no hassle with all of these mattress :-)