Vespero is a slatted wooden bed base by Poltrona Frau.Supporting frame: in varnished beech plywood panels.Slats: the flexible slats are in steam-curved and -pressed beech plywood; they allow the mattress can always breathe. Suspension joints are made of plastic.Functions: adjustable rigidity under the lower back. High absorbency under the shoulders. Information on rigidity are engraved on the slat that allows the adjustment.Aesthetic details: all Frau Comfort bedsteads are engraved with the logo on the last footboard side slat.Matching mattresses: all mattresses in the Poltrona Frau collection