Twin Size Mattress Pad Protector - Vinyl Free, Hypoallergenic & Waterproof Cover - Terry Cotton Topper - By CalmniteTM Offered by Eco Home USA Price: $59.95

I was fortunate to get this for my grandson he is 3 years old and moved to a twin bed. ( he calls it his big boy bed )
He is potty trained but once in a great while he will have these awful nightmares. I believe this is why I think this mattress cover is awesome

Each mattress cover is outfitted with an extreme waterproof membrane layer that is built to prevent spills or mistakes.
Another bonus it fits like a fitted sheet.
You would think it being waterproof it would be noisy but it's not all.
I have ran it through the washer, and dryer, it didn't shrink or have any loose threading.
Allergen Protector
100% Waterproof
Various Seizes Fitted Sheet Style No Crunch ( Twin, Full up to 14" ) ( Queen King up to 18" )

I hope you find this information helpful in your buying decision . I received this product for a discount in a exchange of my honest and unbiased review..