R&L Half-Zip Racing Shirt Size M (Men's), Length 65cm Width (Pit to Pit) 45cm For trail running and road cycling Ultra-lightweight, quick-drying material. The vibrant blue color is impressive. The half-zip allows for ventilation, making it comfortable even in hot weather. It has a back pocket, common on cycling shirts, which is convenient for storing smartphones and energy gels. I bought this for trail running, but I've gotten into marathons and haven't had much opportunity to use it, so I'm selling it. It's in good condition, but please understand that it is used before purchasing.