On a warm Spring day, you go for a run on a trail where you can enjoy the serenity of nature. The weather forecasts said it might rain today. A good day to keep this rain jacket handy. It's fully waterproof yet stretchy and breathable. Three light layers repel the water and stretch together to keep up with your body's movement. Ventilation openings on the side allow your skin to breathe without letting any water in. The back pleat makes it easier to wear a jacket with a vest. All with reflective overlays that help you stay visible in the dark and a pocket to pack the jacket neatly into your bag. Men's sizIng.