This is great! I have a memory foam bed topper on our mattress which means I have to get extra deep pocket sheets. This actually has DEEP pockets. It fit perfectly on my bed and had enough material to cup it underneath the mattress to make sure its really secure - so no slipping and sliding around under your regular sheets. The padding of this pad actually cover the entire top part of the mattress too. I had a different waterproof mattress cover that only covered the center part and the sides were mesh so not full coverage. This has full coverage so the whole top of your mattress is protected.