The YATE X-TUBE is based on the EXTREM LITE series, which increases the comfort of sleeping without increasing the weight and volume. The air tubes on the sides prevent slipping off the mattress and increase its lateral area by 7 cm. The lightweight core reduces the weight of the product. WARM ZONE - under the back and the sides, the foam is lightened by horizontal channels and therefore there is more foam to ensure sufficient insulation. Very light and small when packed.