Serta - Perfect Sleeper Dazzling Night 12" Hybrid Medium Smooth Top Mattress - Twin - 500104381-1010Featuring a 3 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. Features: Medium Smooth Top Hybrid A simple solution for perfect sleep, every night Designed with zoned comfort for a more restful sleep Cool Twist Gel Foam Cool Twist Gel Memory Foam 3 Zoned Coil Design CertiPUR Designed and Built in USA Adjustable Base Compatible 10 Year Warranty