12" FOAM CONSTRUCTION WITH WEDGE SUPPORT AND AIR CHANNEL BASE
Great affordable price for the quality!
Shame on me for not looking at it closer in the add on option. The protector is similar to a fitted sheet and only covers the tops and sides of the mattress. Fabric seems just fine.
Quiet motor, smooth operation. The only complaint I have is with the packaging. Thin cardboard is an adequate for the weight. Two holes in the box when delivered by FedEx. Two tears in the covering. MOre cosmetic than functional.