Online Only. Medium Firm Pillow Top 2-Sided Flippable Mattress. 650 helical offset coils with SpiralLok™ zoned with centre reinforcement for additional support under the heaviest part of your body, layers of CertiPUR Foams including high-density foam for durable cushioning across the entire sleep surface, and Super Soft Latex on both sides. 10-Year Non-Prorated Warranty. Box Spring Sold separately.