These clips are a very good solution to waterbed problems as older sheets and mattress pads tend to get stretched out and will not hold. These clips are like old style garter clips, they hold only the cloth, and the weight of the bed keeps them from coming unclipped. I'm also going to try them on bedsheets not made for waterbeds, and see how they work.
Simple-to-use elastic straps keep fitted or top sheets securely in place so they won't wriggle free during the night. Just clip to the corners of the sheets and slip under the mattress. For use with sheets on extra-thick mattresses, waterbeds, sofa beds, air mattresses, and futons. Four straps per package.