If you're training and racing when the weather is bad you need a jacket with excellent water protection as well as a very high level of breathability. To acheive this dual aim Endura use ExoShell40™ 3-Layer waterproof fabric for their Pro SL Shell Jacket II. This very lightweight fabric has an ultrafine, fluorine free waterproof membrane, which is up to 50% thinner than standard membranes, and an additional proprietary compound impregnated within it to achieve an incredible rate of moisture transfer. The result is complete dryness, both from the wet weather outside and no sweat inside, even at higher riding intensities. As a jacket that's been developed with racers and fast training in mind, Endura have kept design fuss free and the cut close, using stretch waterproof shoulder, side and cuff panels, ensuring no wasted watts. An external gel pocket is perfect for that final push to the line, while a zipped rear opening allows access to rear jersey pockets. Either worn from the start or packed up in a jersey pocket, just in case, the Pro SL Shell Jacket II will keep you zipping along wet roads in total comfort.