Spring Top Dual integrates the patented Revertop® system, which allows you to change sensations and ventilate the mattress by simply turning the topper over. The summer side with Tecnofresh® fabric provides coolness and breathability, while the 4D Stretch side offers softness and warmth. With its DualSac® Soft core and NanoSac® layer, it provides an enveloping and adaptable support, guaranteeing a soft and ergonomic sleep.