TechGearLab

If you're hunting for a mattress protector that zips completely around your mattress, protecting it from damage from any angle &mdash; or protecting you from pests that have taken up residence inside &mdash; the PlushDeluxe Premium Zippered Encasement is the best of the bunch. It has a fine-toothed zipper concealed in tight folds of fabric, with two Velcro strips to help seal it shut. Compared to other encasements we tested, this one seems the most secure when appropriately closed. We found it easy for one person to install on a mattress. It performed adequately in our liquid resistance testing, keeping the bulk of our spills from soaking into the terry top.
Once again, this terry top holds onto stains more than we'd prefer. When putting it on your bed, you will need to get the air out before sealing it; otherwise, you will create a balloon effect on top of your mattress. We did a few snow angels on the bed before fully closing the zipper. The PlushDeluxe Zippered Encasement model has its terry surface on just one side, making it not conducive to flipping. In sum, this is the most impressive-performing full-encasement mattress protector we tested. 
Health rating: None

If you're hunting for a mattress protector that zips completely around your mattress, protecting it from damage from any angle &mdash; or protecting you from pests that have taken up residence inside &mdash; the PlushDeluxe Premium Zippered Encasement is the best of the bunch. It has a fine-toothed zipper concealed in tight folds of fabric, with two Velcro strips to help seal it shut. Compared to other encasements we tested, this one seems the most secure when appropriately closed. We found it easy for one person to install on a mattress. It performed adequately in our liquid resistance testing, keeping the bulk of our spills from soaking into the terry top.
We had a few gripes with this protector. The terry top holds onto stains more than we'd prefer. And, when putting it on your bed, you will need to get the air out before sealing it; otherwise, you will create a balloon effect on top of your mattress. We did a few snow angels on the bed before fully closing the zipper. The PlushDeluxe Zippered Encasement model has its terry surface on just one side, making it not conducive to flipping. In sum, this is the most impressive-performing full-encasement mattress protector we tested. 
Health rating: None

amazon.com

walmart

Wirecutter

With superbly reinforced seams, a secure zipper, and a smooth feel, the Protect-A-Bed is protective and the most comfortable encasement to sleep on.

With superbly reinforced seams, a secure zipper, and a smooth feel, the Protect-A-Bed is both protective and the most comfortable encasement to sleep on.

Mattress Encasement Comparison