This is a must buy if you purchase a memory foam topper. I was very please with it when I received it. We had a bit of a struggle trying to get the mattress topper in but when almost done I then realized it not only had a zipper on the top it had one going down the side which if I had realized that at the beginning It would have been very easy to put the topper in. Love this cover and also the 4 in. memory foam topper so much that I purchased two more sets one for my mother for xmas and one for my camper. I think you would be pleased if you purchased this product.