“I took an M. Perfect size for my body (184cm, 78kg). Very light and really fits into the back pocket. I've tested it on a longer 4h ride and it was perfect. I didn't have any rain but the jacket protected me nicely from the morning cold. Surprisingly, despite the temperature going later up to 25 degrees, it was still fine to ride in the jacket - I didn't feel it was too hot. Really happy with the purchase.”