"What Our Gearhead® Experts Are Saying: ""This jacket feels like a true second skin. The SPHERE panels block wind and water while adapting to intensity, so I stay warm on the roll-out but don’t overheat when I push hard. It’s aero, weatherproof, and the most comfortable winter jacket I’ve ever worn."" When cold weather threatens to slow us down, the Assos Equipe RS JOHDAH Ultraz 3/3 Winter Jacket keeps us riding fast and focused. Built from Assos’ new SPHERE fabric series, this softshell system strategically combines panels of different insulation and stretch, delivering a race-ready fit that’s as protective as it is responsive. Waterproof and windproof layers shield us from the elements while actively breathing, so our microclimate stays balanced whether we’re warming up or driving hard on the front. Assos pairs SPHERE with supporting OSMOS thermal textiles and 3-layer ZigZaggy Foam in less exposed zones, creating a supple jacket that regulates temperature without bulk. AeroFit tailoring hugs close like a second skin, eliminating the drag and excess material that plague traditional winter jackets. For us, it means comfort, speed, and confidence in the harshest winter conditions."