To begin with, the Serta Perfect Sleeper Pro Valais welcomes you with a CoolFeel™ Pro quilt that feels cool as soon as you lie down. Next, a thick, cloud-like luxury comfort feel pillow-top blends graphite-infused responsive natural latex foam layer with Cool Twist® Gel Memory Foam. 

Because of this pairing, the surface hugs curves and keeps the temperature pleasant, making it the best 15-inch mattress for side sleepers who want pressure relief without heat build-up. Beneath the foams, a Five-ZoneActive™ lumbar band partners with a soft pillow top mattress with 1000 coils to deliver targeted spinal alignment support and advanced motion isolation for couples. 

Excel Edge™ Elite rails brace every side so you can sit or stretch to the edge in total confidence, while the 15-inch profile adds a luxurious high-rise look that still fits extra-deep sheets.