This jacket does three things really well: the Tempesta Stretch fabric provides full waterproof protection, the four-way stretch makes it fit any body type, and it looks great on and off the bike. Compared with our more expensive GORE-TEX® Idro jackets, you give up the best-in-class breathability and extreme packability, but you gain stretch fit and increased durability. We developed the fabric to our own specifications to make a jacket that is fully waterproof, comfortably stretchy, packable enough to fit in a jersey pocket, and with an appearance and hand that make it look great. This is meant to be a rain shell worn over a jersey, so we've forgone the external pockets and kept the construction simple to minimize seams. We've given it a vent on the back to prevent overheating, a covered zip to keep spray out and reflectivity for safety.