The Yate CONTOUR has the same parameters as the TREKKER, but has a slightly different surface material with a contoured pattern. It stands out for its quality of material and workmanship. The surface is 75D polyester, which is durable and prevents the sleeping bag from slipping. 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.