Spring Top 7Z integrates the Revertop® system, which allows you to change sensations and ventilate the mattress by turning the topper. In summer, the Tecnofresh® fabric provides coolness, while the Stretch 4D side offers softness and warmth in winter. Unlike the Dual model, its ComfortSac® 7Z Firm core with seven differentiated zones provides specific support for each part of the body, ensuring correct alignment of the spine and a stable, firm and progressive rest.