Another reason we no longer have our IQ is that when the wind blew when you are trying to sleep, you would get vibrated up and down, and hear the slide topper flopping right above your head.
We always used Travasaks, (twins) with no bedding on the bed. We hate making up the bed every time it's sleepy time. The saks would just fold in half, then we'd manually pull the far back mattress up partially onto the front one to kinda start the process, then let the slide do the work finishing up the placement of the rear mattress over the front as it pulled in. Easy process but required someone to be watching things as it came in.