I have other similar products that go under the sheet, but these don’t have anything to keep them in place so inevitably the wet part ends up only half on it. The addition of tuck-ins keeps it in place and the size means it can go up under the pillow too ( not sure how but my boys tend to be wet all the way up to the pillow!). I found that even when my son had a little accident the Conni Kids bed pad wasn’t wet, so enabled him to be changed and put back to bed. Easy to wash, and dried really quickly compared to our other wet bed sheets. A great product in very sense, and I would highly recommend it to other parents.