From National Allergy® BedCare, this cover features: 

Stop allergy flare-ups and night-time congestion with this mite-proof and bed bug-proof all-cotton feather bed cover. Your bed is a breeding ground for dust mites. As they eat dead skin cells, they leave waste behind. You can't see it, but you can breathe it. Some people are quite allergic to dust mite feces. The most doctor-recommended way to reduce dust mite allergen exposure and get protection from bed bugs is to cover your bed with allergy-proof protective covers.

• Dust Mite Proof: BedCare All-Cotton Feather Bed Covers eliminates exposure to dust mites and other allergens; The cotton barrier fabric is woven so tightly that only air can get through. The mean pore size is just 2.6 microns
• Bed Bug Proof: As an added bonus, this bedding set is also bed bug proof. Made with our patented BugShield system with an auto lock zipper that will not backtrack when closed; The BugShield Bug Blocker is an added barrier that closes the last inch or so of the zipper from below to create a fabric shield under the zipper closure to doubly ensure that bed bugs will not be able to get in or out of the encasing
• Twin approx. 75" x 39" x 2"
• Full approx. 75" x 54" x 2"
• Queen approx. 80" x 60" x 2"
• King approx. 80" x 78" x 2"

Imported.