GLACIER LUXE FIRM GL1 - 10 YEAR WARRANTY This double-sided mattress bolsters a heavy duty 416 spring unit. You ll get twice the longevity for half the price. This is a firm mattress. Double-sided is in Double-sided - 1.25 Firm Quilt 416-13 High Profile Spring 1.7 Density Super Firm Foam Foam Edge Guard Support 10 Year Warranty