The Serta iSeries Hybrid 500 14 cushion firm mattress combines new technologies in new ways for a better night's sleep. A firm mattress with a touch of softness, the Serta iSeries Hybrid 500 consists of an advanced 886 Pro-Supportâ„¢ Coil System innerspring core surrounded by firm foam that extends the support right to the edge of the mattress, topped with three layers of cooling foam and a HyperFeel cooling cover. That means you get foam comfort, innerspring support, and advanced cooling for a sleep experience you've never had before. The Serta 500 mattress provides pressure point protection, relieving existing pain in the back, shoulders, and hips, and preventing new pain from developing by encouraging proper spinal alignment no matter your sleeping position: on your back, on your side, or on your stomach. The mattress is also constructed to promote motion isolation-meaning if your partner shifts during sleep, it won't disturb yours. Try out this Serta 500 mattress in your local Mattress Firm store, or even in your home by purchasing online to take advantage of our 120-night sleep trial. A better night's sleep is just a few clicks away.