Comfort level: plush High-density response memory foam; high-density whisper foam 918 power packed 15-gauge wrapped coils Ashley Edge "steel encased"; 2 perimeter rows of 13-gauge wrapped coils for edge support Base support foam 4-way stretch cover Luxury pillow pocket technology Adjustable base compatible 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