General Note: Please allow 24 - 72 hours for your Mattress to regain its full shape. Any memory foam will expand faster in a warmer room. In cold temperature, at delivery, your mattress may take a bit longer to return to full sized from its compressed state.The expansion time of the mattress will vary as per the surrounding Solve your sleep problems - This Sweetnight Full-size 10 inch mattress is designed with independently encased tempered steel coils and gel memory foam for maximum support, heat dissipation, and for relieving pressure points along your neck, shoulders, back, and hips. You'll enjoy lightly-conforming comfort on top and stable, deep-down support below for restorative sleep. This hybrid mattress helps those with back pain, tossing & turning, and resists spring sagging and roll-off and sinking. Support and Undisturbed Sleep Full mattress - Individually wrapped coils work independently to provide a localized bounce in different zones. Adapts to the size, shape, and weight of any type of body for the perfect level of support. Delivers a dramatic light-as-air feel. Offers you targeted support and helps to reduce motion transfer. Cooling Gel Memory Foam provides cradling support and helps to dissipate body heat. Provides you the best of both worlds with innerspring mattress support and memory foam comfort.