ComfortCare Signature Hybrid Collection, is a combination of a Memory Foam Mattress and a Pocketed Coil Innerspring Mattress, making you the winner by enjoying the benefits of both! Pocketed Coils adjust to your body with additional coils in the center third for even more support. Memory Foam forms to your body and reduces pressure allowing you to sleep through the night. With an Outlast® Cover to keep you dry and cool, you'll look forward to nights rest. This would be a good mattress for a stomach or back sleeper.