The Serenity Hybrid Gel Memory Foam Collection is designed using Gel Memory Foam. Serenity Ventilated gel memory foam is made using high-density foam and strong breathable fabrics. I like it because it's  superior durability of this high-quality design is backed by a 10 year full replacement warranty. 
 
 
 
  
12 Inch Hybrid mattress is a Ventilated top gel memory foam with pocket coils and foam encased edges, it gives you the best of advanced comfort and support
  
2" Ventilated Gel memory foam to keep you cool at night
  
1"3.5lb Traditional memory foam for shoulder hip and back support
  
Foam encased edge support for sitting on the edge and a bigger sleeping surface without feeling like you are rolling out
  
Pocket coil support system for longevity, zero motion transfer, support and mobility