The MILLE GT Ultraz Winter Bib Tights are constructed with an arsenal of winterproof textiles to deliver unmatched levels of insulation, breathability, and weather resistance. We built upon the highly insulating platform that’s used in our standard Winter Bib Tights but then added a second layer to the exterior for more protection. Since weather can come from all sides, we charted 360 protection and comfort to ensure that the element-facing section of your legs and glutes remains protected from snow, rain, wind, and low temperatures, while the backs of the legs benefit from added breathability and comfort in this high-flex zone. To boost the Ultraz Bib Tights’ performance, we’ve pre-shaped and sewn the fabric panels to fully wrap and support the upper leg muscles, knees, and calves while in motion, where they flex with each pedal stroke.