The Kimberly Extra Firm Hybrid Mattress, by Restonic, gives you the perfect combination of innerspring support and Memory Foam comfort. Zoned Individually Wrapped Coils, with extra support in the middle third, adjust to your body providing exceptional support. Comfort layers featuring Gel Infused Memory Foam, relieves pressure points with out generating heat. A special Luxurious Designer Cover with Soft-Cool Finish™, wicks moisture and heat away giving you a fresh sleep surface. This Extra Firm Mattress is ideal for a stomach sleeper or a back sleeper who prefers a firmer feel.