One of our wood structure frames, Evoluta 300 is a particularly comfortable motorised wood slat mattress frame. It features an emergency battery that can be used to return the bed to its level position in the event of a loss of electrical power. The beech plywood slats are anchored to the frame by silent nylon supports. The queen size version is made from two independent frames. The lumbar zone features stiffness adjustment sliders to ensure that the frame offers just the right amount of support.