Review on Hold-Up Brand Crisscross Fitted Sheet Strap Stay-Downs: US Patented Gripper Clasps Ensuring Secure Bedding Fit by Scott Wilson

I think I've tried every product ever made to hold sheets in place. I returned everything. I have a SleepNumber Queen mattress that is 10 inches deep and most of the sheets are made for those odd 18 inch thick mattresses. Even the sheets I bought that claimed to fit and stay firm on 10 inch mattresses. I returned everything! Bottom line is I don't use them criss-cross like they suggest but side by side on the sheet and after 3 nights sleeping on the sheet made to match the boat it's still snug and wrinkle free! These WORK! I also bought their angle straps but found that they are not needed. They're a little tricky to put on when you're making your bed, but it's worth it! I've been using them for two years now, every time I change beds, and they still work just as well as when I first bought them.