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

I really wanted it to work well and it worked for me. An 8" or 9" deep mattress constructed with Sealy post-itped memory foam, allowing the sheets to curl up on the sides. The corners of the sheets are not a problem. The middle area fits and then bumpy. Not enough grip to hold that large area with those little latches. The mattress is too heavy for me and difficult to lift to make the bed. They need to be tightened and adjusted, but then when you take out the sheet to change, they spring back under the mattress. You have to lift the mattress and find it by touching it. It's very difficult for me. I am 5ft 1in and 115lbs. I think I'm back to the drawing board. I've used velcro with the best results after sewing it to the sheets and attaching the other half of the velcro to the sides. I would not recommend this product to anyone over the age of 59 with my type of mattress.