Maybe the aeroFit of our summer-weight RS series spoiled us, but we find the bulky, ill-fitting jackets available for winter cycling unacceptable. Realizing our race-fit ambitions required an all-new line of warm and weatherproof softshells, we developed the SPHERE series, which replace our Stratagon line. Various weights of SPHERE panels arrayed throughout the jacket’s body create a winter-worthy second skin that responds to exertion and motion by breathing and regulating internal temperature. During easy efforts, the jacket warms; as effort ramps up, so does breathability and ventilation, maintaining a comfortable, dry microclimate, regardless of exertion and the external conditions. The johDah reacts to you like a literal second skin, as though it’s an actual part of your body. The aeroFit tailoring does nothing to disabuse you of that impression.