Standard box

Reinforcement perimeter structure ideal to allow the springs to always function perpendicular to the resting plane.

Bonnel spring system

The interconnected Bonnel springs are hourglassshaped and undergo a special treatment to ensure excellent rigidity and long life. The springs are connected by steel spirals running transversely through the mattress. The extraordinary solidity of the system retains the elastic and ergonomic performance intact, facilitating correct sleep.