Comfort level: firm Luxury cotton fiber; super support polyester fiber Ultra-firm support foam High-density quilt foam; high-density gel support memory foam High-density base foam 528 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 10-year non-prorated warranty 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 State recycling fee may apply