What the Warranty Covers Any sagging that results in a noticeable dip of more than two (2) inches in the mattress and is not caused by an inadequate bed base. Any physical defect in the mattress that causes a tear or crack in the foam, despite normal use and proper handling. Any defect or fault in the zipper system of the breathable quilted mattress cover. What the Warranty Does Not Cover Normal softening of the foam after long-term use. Preferences regarding mattress comfort or thickness. Stains, burns, tears, cuts, or liquid damage caused by usage or environmental factors. Damage caused by using an inadequate bed base. A product sold by an unauthorized retailer or a product sold in any way as a “used” product or under a similar formulation.