VENINI 14 - inch Plush Pillow Top Support Foam and Spring Mattress, Comfort 4 Way Stretch top, Cool Sleep, King Features & details: CLOUD-LIKE CUSHION: Pillow top delivers immediate plush, soft feel for a soothing cradling effect and added pressure relief. HI TECH HYBRID TECHNOLOGY: Multiple layers of comfort support memory foams help with air flow and regulate heat for a cool comfortable sleep while encased pocketed springs absorb and isolate motion to reduce partner disturbance & promote a blissful nights sleep. ERGONOMIC SUPPORT: Memory foam responds to your bodys weight for customized support by conforming to your curves to eliminate pressure points and increase comfort. ENVIRONMENTALLY-SAFE: Zero harmful chemicals. All CertiPUR-US foam with NO HARMFUL CHEMICALS - No formaldehyde and low VOCs, (which can possibly worsen asthma, cause headaches, dizziness, and nausea) HANDCRAFTED IN US: Handcrafted by American artisans. Backed by a 10-year limited warranty. Premium quality at an affordable price. Delivered in an easy-to -unpack compact box. Your mattress may take a little time (24-48 hours) to grow to its optimum size after coming out of the box. Benefits of waiting a full 24-48 hours include expansion & ventilation. Sleeping on the mattress before the 48 hours will not impact the quality or comfort of your new mattress.