Zinus 8 Inch Hybrid Green Tea Foam and Spring Mattress offers firm support for a better night's sleep. This innovative mattress features a Fiber Quilted Cover, High-Density Support Foam, Green Tea ViscoLatex Foam Comfort Layer and 6 Inch Coil Springs. 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. Worry free 10 year limited warranty. Another comfort innovation from Zinus. Pioneering comfort.