Box system, made from hundreds of springs contained in a side support system made of crushproof, expanded polyurethane. In fact, there are used side bands made of water-based, expanded polyurethane, completely eco-friendly, breathable, which do not sink.
Box system, combined to the exclusive springs, keeps the body in the right position, offering the right support in the points of higher pressure. In this way, this system meets the needs of someone who prefers the traditional system, guaranteeing the proper support, rigid and flexible in the right area.