The Engage 11-Inch Cool Gel Foam and Innerspring Mattress is a Hybrid gel memory foam and innerspring mattress that combines the best of two leading sleep technologies at incredible value. The pocketed coil base gives the mattress unprecedented orthopedic support and eliminates motion transfer between partners while progressive layers of ventilated gel memory foam provide firm comfort and optimal spinal alignment. Gel draws heat away from the body, creating a cooler sleep surface, which prevents tossing and turning, making for a more restful night’s sleep. The cover has 4-way stretch which conforms to your body for comfort, while working with the layer of gel memory foam to optimize its contouring properties. This mattress ships compressed for quick shipping and easy delivery and set up. The box will be able to fit through narrow hallways and staircases.