The Night Therapy iCoil® 8″ Spring Mattress by Zinus features Pressure Relieving Comfort Foam® and Fiber Quilted cover and 7.5 Inch iCoil® Pocketed Springs for support. The hundreds of independent iCoils® reduce motion transfer from a sleeping partner, and maintain customized spinal alignment. Enjoy the comfort and pressure free support for a healthy night’s sleep. Please open your mattress package within 72 hours of receipt and allow 48 hours for your new mattress to return to its original, plush shape. 10 year limited warranty.