The Keefer mattress features an extra-plush layer of Serta's Cool Action™ Gel Memory Foam, the world's first premium memory foam infused with the support and cooling touch of Serta's MicroSupport® gel – now available for the first time in Perfect Sleeper. It is designed with a unique set of features to help solve

5 common sleep problems:

1. Helps reduce tossing and turning with Cool Action™ Gel Memory Foam
2. Encourages proper back support and alignment with the Comfort Last® Foam Core
3. Promotes a balanced sleep temperature with Cool Balance® Technology
4. Minimizes impact from partner movement with our TrueSense® motion-isolation design
5. Resists sagging and edge roll-off with Serta's Ultimate Edge® Foam Encasement.

This mattress also features a plush layer of Serta's PillowSoft™ Foam for gentle cushioning and is compatible with a Serta adjustable foundation, including the Pivot™ Head-Up and Motion Essentials™ II models.