9 - 11 Deep , Twin 9 LOW PROFILE : The Original Sleep Defense System - Waterproof / Bed Bug / Dust Mite Proof - PREMIUM Zippered Mattress Encasement & Hypoallergenic Protector - 38-Inch by 75-Inch, Twin - LOW PROFILE 9"

I spilled an entire cup of tea on my bed and NOTHING leaked through! I’m here to replace that cover only because my partner left it on the floor a few days and by the time he went to wash it, it had started to grow mold. This saved me $100s of dollars because I would have had to replace my mattress if I didn’t have this cover.

All in all this beauty is a winner! I was pleasantly surprised at how well this encasement fits. My memory foam serta icomfort mattress is a regular twin size at a height of 9 inches. There is about 2-3 inches of excess material in the length but the rest of this encasement fits perfectly-no wrinkles. Normally, the memory foam sleeps rather warm to hot. But with this encasement the mattress actually sleeps somewhat cooler. Did I say its also good looking too. I just got it so I don't know about durability but it seems very sturdy and exceptionally well made. I have not tested the water resistance. So far I really like it! And so does my cat.

Hopefully we will never have bedbugs, but I sleep easier knowing our mattresses are protected by these sturdy-seeming encasements. They are easy to put onto the mattresses, and zip closed super-tightly with a nice piece of velcro to cover the end of the zipper.

I love this mattress protector. It goes on really easily and even though I haven't spilled any water on it, it seems really durable. I really like the little zipper garage that it has. And I haven't noticed any crinkling sounds like you can get with other mattress protectors. Highly recommend.

I have a cat and a dog that sleep on my white leather couch. I keep the cushion zipped up in this mattress protector. I woke up this morning to find my cat had burped up a big pile of cat food in what looked like a puddle of orange battery acid spreading out in all directions. Sadly, I unzipped the cover to wash, thinking my couch was destroyed. NO! I don't know how many hours had gone by since she got sick on it but this mattress protector blocked her puke from leaking through onto my beautiful couch! I literally can't believe it. Thank you to Hospitology for making these things. I have 2 gorgeous white leather couches I keep covered the cushions covered zipped up in these covers. I just ordered two more. These things are brilliant!