The BIO mattress is equipped with an enhanced comfort Memory Foam layer on the winter side, which creates an individual body imprint during sleep, while the summer side is provided with a Hard felt layer and a comfort polyurethane layer. Thanks to the balance of "comfort" and "enhanced comfort" layers it has, it helps maximize relaxation and is oriented towards the correct support of the spine during sleep. The inter-spring space contributes to the easy circulation of air in all directions. Ventilation takes place through a special aeration strip placed along the entire side of the mattress. The high porosity and permeability of the external Knitted-type fabric favor a much more intense circulation of air, thereby facilitating moisture elimination.