The transitional seasons are tricky for cycling. Over-dress, and you risk sweating your way to a clammy chill once you've warmed up; underdress, and you start out cold and can never recover. The Pearl Izumi Women's Elite Pursuit Thermal Jersey takes the guesswork out of those transitional months by combining thermal insulation with greater breathability and ventilation than full-on winter kit. The jersey's warmth gets you out the door into the cold air, but it doesn't turn stifling after the first 20 minutes in temperatures ranging into the mid 40s. That means it's enough to tide you over between the time you clip in to the time your body can heat itself, which in turn should cover the gap between late September and mid-November.