Sleep Master iCoil 13 Inch Euro Top Spring Mattress and BiFold Box Spring Set,&nbsp;King Luxurious, customized mattress support from iCoil Pocketed Springs and Foam and Fiber Quilted Cover Smartly Shipped - Our patented technology allows our mattresses to be efficiently compressed, rolled and shipped in a box conveniently to your door The BiFold Box Spring is designed to look like a traditional box spring with heavy gauge steel frame and fabric cover Folding mattress foundation compresses for easy mobility and storage Mattress: Worry Free 10 year limited warranty BiFold: Worry Free 5 year limited warranty