Straps are very adjustable so you can choose how elastic you want them to be. Even works on memory foam mattresses. Has metal teeth for great grip. Stretch is adjustable.

Put them on 1 time went to change my sheets and the clip on 1 side fell apart. They also pinch the fitted sheet very tight that i was afraid of it ripping. The * are very poorly made and break very easily.

These comes with a upgradable 2 year warranty but * if i see how they make any money. Didnt last 2 months. Come on america we need to get back to only supplying american made goods that are worth a *.

Sheets come in so many depths today. These hold it in place so that it doesn't slide up the bed. It is actually a large throw but i use it as a blanket.