GLACIER LUXE PILLOWTOP I GL3 - 10 YEAR WARRANTY This double-sided pillowtop mattress bolsters a heavy duty 416 spring unit. You ll get twice the longevity for half the price. This sets up nice and tall. Motels and hotels tend to buy this mattress due to its durability, feel and longevity. Double-sided is in Double-Sided Pillowtop 416-13 High Profile Spring Unit 2in Quilt w European Stretch Knit Foam Edge Guard Supports 12in Thickness 10 Year Warranty