MOTION ISOLATION & BALANCE SUPPORT - The 12 inch mattress king features an individual pocket coils spring system that keeps isolating motions from other people or pets sleeping next to you. It balances your body weight, keeps spinal health, provides support and relieves pains. Whether you are a side sleeper, back sleeper or a stomach sleeper, this mattress always gives you a more quiet and deep sleep experience. GEL MEMORY FOAM ENHANCED COOLING FEATURE - The five-layer hybrid mattress, equipped with gel memory foam & high-density foam stabilizes your sleep temperature. It controls temperature accumulation that disrupts a comfortable night's sleep and is further optimized for temperature control, heat dissipation and pressure relief. The comfortable gel memory-foam layers guarantee a cool feeling at night while you sleep. DUAL EDGE SUPPORT SYSTEM - The king pillow top mattress provides a dual-edge system to enforce the edge innerspring firmness, body contouring, as well as protection of the mattress.spring mattress has 4 handles that help you to move it easily MATTRESS IN A BOX & FITS FOR MOST BASES AND FRAMES - The 12" king size mattresses measure 80" L x 60" W x 12" H,which are rolled and compressed in a box for shipping. Setting them up at home is an easy task. They are compatible with most of bed frames and can be used without a spring box. Unseal the mattress and let it inflate for about 72 hours to enable full expansion.- Shop our US Certified foam mattress bed with confidence , since we provide our twin pillow top mattress with a 100-night sleep trial.