MATTSHIELD Ultimate 3-Piece Encasement Kit

Queen / Zippered Cotton

Best for 9-18" deep mattresses

$42.95$14.32 each

Price from our latest catalog update. Checkout, delivery and returns happen at our retail partner.

Fits 9-18" deepMeasure seam to seam first
Zipper all roundCovers all six sides
Price from our last updateThe partner checkout has the final price
Sold by our retail partnerDelivery and returns are theirs

What you get

Top: cotton terry top.
Closure: zipper all round.
Covers all six sides of the mattress or box spring.
Waterproof, as the maker states.

How to use it

Measure the mattress from the bottom seam to the top, pillow-top included.
Zip the cover shut all round, and close the end of the zipper the way the maker shows.
Leave it on: bed bugs zipped inside die there in time.
Check the cover for holes and tears when you change the sheets.
Pair it with interceptor cups: a cover does not stop a bug from climbing onto the bed.

Will it fit?

Sizes: Twin, Twin XL, Full, Queen, King, California King. The maker cuts it for 9-18" deep mattresses.

Find the cover for your bed size and depth.

Mattress encasement plus two zippered pillow covers

One box covers the whole bed: a zippered mattress encasement and two zippered pillowcase encasements. You choose a cotton or an organic version, and the organic one comes in Twin XL through King. For a Queen, the maker gives 60 by 80 inches and a fit for mattresses 12 to 17 inches thick.

Your sheet lies on cotton terry, with a waterproof layer running around all six sides of the mattress cover. The maker calls the set bed bug proof. What you can see for yourself is a zipper that closes the mattress fully inside the fabric. The pieces go in the washing machine, and sizes run from Twin to California King.

MATTSHIELD Ultimate 3-Piece Encasement Kit is part of the Bed Bug Blocker assortment, on the mattress encasements shelf.

Every MATTSHIELD Ultimate 3-Piece Encasement Kit option we carry
Option	Fits depth	Price
Twin / Zippered Cotton	18"	$35.95
Twin XL / Zippered Cotton	18"	$35.95
Twin XL / Zippered Organic	18"	$39.95
Full / Zippered Cotton	9-17"	$39.95
Full / Zippered Organic	18"	$42.95
Queen / Zippered Cotton	12-17"	$42.95
Queen / Zippered Organic	9-18" deep (model)	$45.95
King / Zippered Cotton	12-17"	$48.95
King / Zippered Organic	9-18" deep (model)	$52.95
California King / Zippered Cotton	18"	$48.95

Side by side
Feature	MATTSHIELD Ultimate 3-Piece Encasement Kit	Utopia Bedding Zippered Mattress Encasement	Linenspa Zippered Waterproof Mattress Encasement	SureGuard Mattress Encasement
Sizes	Twin, Twin XL, Full, Queen, King, California King	Twin, Twin XL, Full, Full XL, Queen, King, California King	Twin, Twin XL, Full, Full XL, Queen, King, California King	Twin, Twin XL, Full, Full XL, Queen, King, California King
Fits depth	9-18" deep	6-15" deep	up to 12" deep	6-20" deep
Top	cotton terry top	polyester fabric	not printed	cotton terry top
Closure	zipper all round	zipper all round	zipper all round	zipper all round
All six sides	Yes	Yes	Yes	Yes
Waterproof	Yes	Yes	Yes	Yes
Maker says lab-tested	No	No	No	Yes
Rating	4.6 (2,862)	4.6 (195,500)	4.6 (39,100)	4.6 (21,700)
Price	from $35.95	from $18.99	from $19.10	from $47.97
Buy

How to use the MATTSHIELD Ultimate 3-Piece Encasement Kit follows the EPA and the University of Kentucky: zip it shut, leave it on for a year, and stand the bed legs in cups.

This is general information about keeping bed bugs out of a bed, not pest control or medical advice. A licensed pest professional, your doctor and the maker's own instructions come first.

What the public sources say

U.S. EPA, "Do-it-yourself Bed Bug Control". Says to set interceptors under each leg of infested furniture, move it a few inches off the walls with no linens touching the floor, check and clean the interceptors every week, keep inspecting at least every 7 days, and use covers that seal mattresses and box springs so bed bugs inside die. Read October 30, 2026.
University of Kentucky Entomology, ENTFACT-636 "Bed Bugs". Says bed bugs zipped inside an encasement eventually die, that an encasement does not stop a bug from climbing onto the bed, that a trap under each leg with the bed pulled off the wall makes the bed an island, and that a dryer at medium-to-high heat for 10 to 20 minutes kills all life stages. Read October 30, 2026.

Each of these sources is linked in our guide on interceptor cups.

Questions

What Bed Bug Blocker shoppers ask about the MATTSHIELD Ultimate 3-Piece Encasement Kit

Which sizes does the MATTSHIELD Ultimate 3-Piece Encasement Kit come in?

Twin, Twin XL, Full, Queen, King, California King, cut for 9-18" deep mattresses. Pick a size above and the price of the MATTSHIELD Ultimate 3-Piece Encasement Kit changes with it.

Does the MATTSHIELD Ultimate 3-Piece Encasement Kit close all six sides?

Yes: the MATTSHIELD Ultimate 3-Piece Encasement Kit zips around the whole mattress, bottom included, with a zipper all round.

Can you wash the MATTSHIELD Ultimate 3-Piece Encasement Kit?

Yes, the MATTSHIELD Ultimate 3-Piece Encasement Kit goes in the washer by the care label MATTSHIELD sews in. Its waterproof membrane wears out faster under high heat, so dry the MATTSHIELD Ultimate 3-Piece Encasement Kit on medium or low.