We have a corner bed in our Prisim. We use a foam topper, plus a cover from sleep by number that helps to keep it cool. That is covered with a form fitting sheet, the top sheet and cover are then put on. It is an extra step to keep it neat, you spread the sheet and cover so the near side is taken care of, then you must tilt the mattress to get the far side taken care of! But it only takes a couple of minuets. The mid-night bathroom brake is a different story, for the one on the far side, you need to be nimble to climb over your partner, and with 3 dogs, and a cat sharing the bed...well you get the picture! Lol