The comfort you expect from Serta now comes in our smallest carton ever. In the Serta Sheepless Night 9" Medium Gel Memory Foam Mattress-In-A-Box, a thick layer of cooling Serta Gel Memory Foam is placed atop the supportive Serta Foam Core to provide a cool, supportive mattress that keeps you right where you want to be – asleep.

The Casper Original Foam Mattress features three ergonomic zones that offer a perfect combination of cooling and targeted support for proper spinal alignment. Perforated breathable foam helps reduce heat by moving hot air and body heat away.