Ran a 15 mi free run through NYC, Brooklyn 2 Manhattan. Tight fit, did not need to adjust while running, easily stored all my stuff. Could easily open it while running. Only Con My stuff was kind of loose inside it.
Almost perfect. Large storage is great. Wear 2 ways. But things can bounce inside and be distracting. I love the colors and capacity. I just wish there was a way to secure small items better.