This mattress protector was perfect! I was given it to use with my LUCID gel memory foam mattress topper, which is 3" thick, but even with the addition to my mattress, it still managed to easily fit over the topper and my bed. The material is soft, breathable and it doesn't make any noise when I move or make sleeping in sheets feel any different than normal. During the summer I suffer from bad allergies, but after using the mattress protector, I have already noticed that they aren't bothering me as much. This mattress protector delivers on all its promises and I would recommend it to anyone looking for a high-quality mattress protector.