A. If you've spent many nights tossing and turning in frustration, having trouble with fitted sheets that don't stay in place, and you're seeking a better option, then our fitted sheet fasteners could be a good choice for you. Our sheet clips can turn a flat sheet into a well - fitting fitted sheet, and they're also suitable for flat sheets or bedspreads. Our sheet fasteners can be easily machine - washed and dried at low, medium, or high speeds. B. Our sheet tighteners can fit your existing sheets. The clips are made of durable plastic, and the cords are made of sturdy elastic ropes. There are markings on the elastic ropes of the sheet fasteners, which can help you know where to place the clips. A tip: You can use two sheet tighteners at the same time. If needed, one can be used to secure the sheet, and the other can be used to secure the mattress padding or protector. C. Recent research shows that losing just one hour of sleep can reduce daytime alertness to some extent. Our fitted sheet extenders can help you deal with those annoying loose sheets. D. Our mattress cover straps are suitable for various types of beds, such as home beds, hospital beds, bunk beds, water beds, camping beds, inclined beds, RVs, cribs, boat beds, down beds, etc. With this sheet fastener, you may sleep more soundly at night.