The 13’’ Nectar Premier mattress offers enhanced cooling, comfort, and support. The temperature-responsive design features a three-inch layer of gel-infused memory foam with phase-change material, which is designed to react to your rising and dropping body temperature for a deeper, cooler sleep. Its five total layers provide greater dynamic support, pressure relief, and softness for added cushion firm comfort. Nectar mattresses come in a box and are made in the USA.