Ergo-anatomic mattress with box system structure composed by biconical Bonnell springs in 2,4 mm phosphated steel, with a lateral polyurethane foam support. The high breathability 3D side band allows the constant aeration of the product, endowed by wool padding on the winter side and cotton padding on the summer side. The covering is in cotton fabric with antibacterial and hypoallergenic Actigard treatment.Mattress with bonnel springs