The Twilight crib mattress is crafted for simple, safe sleep. with a triple-laminated waterproof cover and six inches of flat and firm foam, the hypoallergenic Twilight is lightweight for easy handling. Like all DaVinci mattresses, the universal fit of Twilight is designed to fit safely and snugly in any of our MDB Family Cribs. Free of adhesives, lead, TRIS, phthalates, and toxic flame retardants for eco-friendly peace of mind. Made in the USA. Triple-Laminated Waterproof Cover Single Piece Composition with Firm, Flat Even Surface 6 Flat and Firm Foam Center 25 Year Warranty Universal Fit is Safe and Secure in all MDB Family Cribs Made in the USA No Toxic Flame Retardants, Meets Federal Flammability Standard CFR-1632, CFR-1633 Hypoallergenic Construction Adhesive, Lead, Tris, and Phthalate Free CPSIA 101, 108, and CA Prop 65 Compliant Made in the USAOverall Dimensions 52 L x 27.5 W x 6 H Item Weight 8 lbs.