The Interchangeable 12-inch pillow top mattress (interchangeable - defines itself as having multiple feels so you can adjust the top of the mattress) soft to firm according to your personal taste, hometown weather, or change of seasons. A top seller for our adjustable beds, the mattress will come medium plush, you can then unzip the top cover and flip the topper for a firmer feel or sleep right on the lower mattress for a medium feel. If you want to firm or soften it up, you can then purchase a latex topper for a 3 more feels ("see our latex toppers") and slip that in instead of the memory foam topper. This is the only mattress made like this and if you want 3 separate feels of luxury this is it! It was designed specifically for multiple comforts. Beneath the top is the "Edge on Edge Support keeping the edge length of the mattress stable. This mattress with the topper has almost 6 inches of 5.3lb visco elastic memory foam, a custom clean airflow allows the mattress to breathe between the two bonds and a 2.2 lb foam base stabilizes the entire mattress. It comes standard with a hand crafted plush Jaquard velour cover or you can upgrade to a Bamboo Cover - Bamboo covers have become the new "it" in the mattress industry. (Eco-friendly bamboo yarn has many benefits for health, besides being beautifully soft to the touch. Highly absorbent, it keeps you cool and dry, and has a natural deodorant action too to keep the cover fresh. It generates negative ions, which have a positive effect on blood circulation.) The zippered top cover can unzip just around the top so you can wash only the top of the cover if you like and not have to unzip the entire mattress. It meets all TB-603 fire safety restrictions. Tempur-pedic does not make a mattress with any of these features and the store retail is close to 4000.00. One of our top selling memory foam mattresses.