From National Allergy® BedCare, this mattress cover features:  Stop allergy flare-ups and night-time congestion with this mite-proof and bed bug-proof all-cotton mattress 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. woven cotton Dust Mite Proof: BedCare All-Cotton Mattress Covers eliminates exposure to dust mites and other allergens cotton barrier fabric is woven so tightly that only air can get through 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 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 machine wash twin approx. 75" x 39" twin extra-long approx. 80" x 39" full approx. 75" x 54" queen approx. 80" x 60" king approx. 80" x 78" California king approx. 84" x 72" Made in the USA. National Allergy® BedCare All Cotton Allergy and Bed Bug Proof 12#double; Mattress Cover