Comfort level: plush, Super-soft quilt foam; super-soft support foam; comfort support foam, High-density gel support memory foam; high-density support foam, 528 individual power packed 15-gauge wrapped coils, Ashley Edge "steel encased"; 2 perimeter rows of 13-gauge wrapped coils for edge support, 4-way stretch knit cover, Luxury cotton fiber; super support polyester fiber, Adjustable base compatible, Note: Purchasing mattress and foundation from two different brands may void warranty; check warranty for details, Foundation/box spring available, sold separately, Mattress ships in a box; please allow 48 hours for your mattress to fully expand after opening