Bodyfit Support TechnologiesLaminated European BirchEach slat is made up of seven laminated layers of sustainable European Birch timber. The flexibility of each slat is such that it mirrors your body's exact curves, which in turn supports your spine's natural alignment.Lasting StrengthConvoluted for additional strength. Slats have the same life as any good mattress (about 8-10 years), after which time they can easily be replaced.SuspensionThe flexible slats are held in place with side-mounted holders. These holders perform like suspension springs in a motor vehicle, whereby increasing the slats' responsiveness and fully supporting your body from head to toe. All combinations of slat support are included in the price of the bed frame. Three levels of support are available.