Polyester Covers Only - Foam elevator not included. Optional covers are poly/cotton; includes velcro strap and fitted sheet type fit, easy to remove and install for machine washing. Designed for Mattress elevator 7" height, but will also work with the 5" height version as well. Avana Mattress Elevator, Provides a 7” to 1” incline down the full length of the bed. Foam bed riser that provides a safe and drug-free solution that can naturally help with symptoms of Acid Reflux, GERD (gastroesophageal reflux disease), snoring, or sinus issues through elevation Install Avana Mattress Elevator under the mattress and enjoy the full comfort, width, and length of your original mattress. split design allows for easier placement and removal between mattress and box spring. the full-bed-length provides additional mattress stability and support. (foam elevator sold separately) For full sized mattresses, supplied as two 27" wide poly/cotton covers. Made with pride at our facility in Atlanta, GA – Thank you for supporting over 170 American workers Includes manufacturer guarantee