Serta Perfect Sleeper Cobalt Calm Plush California King Mattress - Ultra Soft Luxury Bed for Side Sleepers & Back Pain Relief - Perfect for Master Bedrooms & Guest Rooms

Featuring a three-zoned coil design, this mattress offers pressure relief and support where you need it, with a Cool Twist® Gel Memory Foam that contours to your body—with upgrades available with more cooling layers and support.

A simple solution for perfect sleep, every night

Designed with zoned comfort for a more restful sleep

Cooling gel is swirled directly into a breathable foam designed to promote airflow and heat dissipation

This unique design features cooling gel swirled into premium memory foam; this breathable memory foam helps enhance airflow and heat dissipation for a feeling that can only be described as a cool, contouring type of comfort

Soft foam provides enhanced cushioning for exceptional comfort and promotes airflow through its unique, gently rippling design

CertiPUR

Gives the sensation of lying on top of the mattress with little give