I'm an avid runner and was impressed with the breathable room this belt bag has! I routinely run 3-5 miles twice a week and take it with me each time now, filling the water bottle about halfway. I appreciate that it is a squirt bottle so I can quickly hydrate instead of fumbling around. I even sling it over my shoulder to take it to the gym when I lift. The zipper pouch fits my iPhone 14 Pro Max, car key fob, and chapstick.