PARK AVENUE PK 1 FIRM MATTRESS - 10 YR WARRANTY We wanted to bring back the functionality of a double-sided collection with a touch of elegance. We have taken our durable 13 gauge tempered spring unit and have it fully foam-encased. This mattress has a great firm feel for those who enjoy need something firm, yet comfortable, to sleep on. 416-13 High Tempered Steel Spring Foam Encased full Edge Support Insulator Pads amp Damask Cover Double-Sided - 1 Deep Puff Quilt 10 Year Warranty