This mattress features a 12 inch medium firm feel ideal for side, back, and stomach sleepers that crave more a well-rounded plush and supportive sleep experience The top layer of foam offers a plush and supportive feel that conforms to the body to ease pressure points without leaving lasting impressions The 2-inch ventilated gel memory foam layer creates a cooler sleep experience than traditional memory foam by helping to regulate body temperature and increase circulation 2 inches of transitionary foam atop 8 inches of dense bamboo charcoal infused support foam provide extra stability and full body support We only use CertiPUR US certified memory foam to ensure your uncompromising safety and comfort; this mattress is compatible with all Lucid Adjustable Bed Bases