It allows you to convert a flat, regular top sheet into a fitted sheet. Likewise, if your sheets are too short, the Bed Scrunchie can serve as a fitted sheet extender. The 360-degree design holds a sheet in place from every angle. There’s no need to lift up the mattress multiple times because it's attached before the fitted sheet gets placed on the mattress. This helpful tool is engineered to hold sheets tight without harming your sheets or your mattress.