I've purchased several mattress protectors over the years and this is definitely the best! I currently have a 6 year old son who still wets occasionally at night. Even with a pull-up on, he sometimes leaks through and soaks his bedding. After getting this Sleep Tite protector from ******, the first time he wet through at night I noticed it didn't even dampen the mattress! No leaking for us at all through the protector!
The sides of this protector are deep and it fits nicely around the mattress and underneath it enough that it doesn't slip off or shift at all. It is soft, quiet to sleep on, you hardly know it's there. Other protectors we've used have been so uncomfortable and noisy. I definitely recommend this product!