Upfront disclosure: I received this item for free through the Amazon Vine Program.I have purchased waterproof mattress covers for our mattresses before, and they all worked to some degree, but this one really works well. We put this on a mattress for an elderly man who has some issues with bladder control. While he does wear adult diapers (which he thinks are wonderful), they do on occasion leak. This results in a lot of bedding needing to be washed. Knowing this we bought this cover to protect the mattress and keep things from becoming embarrassing for him. Since we had had covers from other companies fail to work completely in the past we put down some absorbent pads between the cover and the mattress. After a couple weeks there was an accident and the bed had to be stripped and everything was washed, but nothing, and I mean nothing, made it through this waterproof cover. We were amazed and really happy. So happy that we are going to be ordering more of these for every bed.I always recommend having one of these covers to protect your mattresses, but now my recommendation is going to be a lot more specific. Buy this one.