Designed exclusively for Sleep Number 360 and Sleep Number smart beds when used with a FlexFit smart adjustable base or Sleep Number integrated base. Zippered cover fully encases mattress and hose openings. Soft-knit fabric is a silky-soft polyester on the surface. The reverse side of the mattress encasement features a waterproof, scientifically-tested polyurethane bond shown to block bed bugs, dust mites and allergens so you can sleep peacefully. Logic™ Label takes the guesswork out of where to start making your bed. A retainer bar will be required for the below bed configuration. This will ensure maximum protection of your Sleep Number® smart bed and can be purchased separately . Learn about the difference between .