STURDY, STRONG, AND SAG-FREE SUPPORT: Premium high-quality and high-density gel foams + up to 900 individually encased TitanCore coils made from 100% steel provide ultimate edge support, motion isolation, and long-lasting comfort. Firm and high-density foam layers provide the ultimate durable support while ensuring optimal pressure relieving comfort whether you are strong, tall, or plus size. PLUS POSITIVE COMFORT BY DESIGN: The firm sleep surface provides the ultimate support and firm comfort to combat tossing and turning in favor of an undisturbed sleep. 12 inches of layers and 9/10 on the firmness scale. ENHANCED COOLING: The GlacioTex+ Cooling Cover and infusion of TitaniumGel in the foam layers are designed to wick away heat and keep you at the ideal temperature while the construction of the coil system promotes optimal breathability. CERTIFIED SAFE MATERIALS: This bed in a box mattress is Fiberglass-free, GREENGUARD Gold certified, and made with CertiPUR-US foams. Each mattress is carefully assembled in our own Arizona facility and delivered right to your door. We want you to be happy with your mattress and that's why we offer a 120 night sleep trial. Firm support for strong, tall, and plus-size. The Titan Plus Core by Brooklyn Bedding provides a one-of-a-kind sleep solution that is the most supportive, durable, and comfortable sleep available. Whether you are big, tall, or powerfully strong, our high-quality foam layers will give you the ultimate pressure point relief to soothe aches and pains and our coils will give you extra lift, extra contouring, and extra durability. Plus, enjoy advanced cooling from our specialty gel memory foam. (Available with an optional sewn-on cooling cover from high tech PE fibers.)