This running pouch can securely hold a 500mL bottle. It can store your smartphone, wallet, keys, bottle, and other essentials needed during a run. Made with waterproof material and reflective material for improved safety. It has three compartments: a front pocket, a main pocket, and a bottle holder. It can also hold a 6.7-inch smartphone. This running pouch can store a water bottle, keys, and small change. For safety, it features reflective material in four places on the front, reflecting light from cars and bicycles during nighttime running and jogging, ensuring safe running. The belt can be adjusted from approximately 68-125cm, making it suitable for most men and women. I have only used it once, so it is in good condition, but please understand. Thank you.