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"

Good quality, easy to put on and comfortable

These mattress protectors fit my 9” twin mattresses snuggly, which is what I was looking for. The zipper is durable and material is more cloth like than others, so it doesn’t sound like plastic. Will buy again if that time comes!

As advertized - good fit, comfortable and protective.

This product is lab tested against bed bugs. I got this for my father-in-law who has bed bugs as a result of staying in a hotel in Texas. After hiring someone to take care of the issue, I put this on his bed to make sure if any were left they would not be able to get to him. This encasement fit really well and zipped into place without issue. I also purchased one for his other beds just in case. They also were easy to install and fit really well.

I liven a part of the country where bed bugs are a real issue. I do not climb into bed without this product (both the mattress cover, and the box spring cover). Priced well. Effectively designed. Quality materials. Well assembled.