1. ADJUSTABLEThe running waist pack has an adjustable waist belt, which can be adjusted according to your personal size to the best wearing position for you. Wider and longer belts are not only more durable, but can easily fit any body type. 2. Special DesignThe built-in pp board of the water bottle holder can be firm but not soft, which can better store your water bottles. The bottom is fixed with a braided rope, and the cross structure is more solid. The fixed strap can be fixed on your water bottle, and by adjusting the tightness, the water bottle is more stable when exercising. 3. LightweightThe back of the waist bag is designed with mesh and breathable, filled with pearl cotton, which is light and breathable. Not only is it more breathable when exercising, but it is also very soft and conforms to the body. 4. Large CapacityIn addition to the large-capacity water bottle, the main pocket is designed with a 45-degree inclination angle, which has a large capacity and does not take up space. The waist of this belt can hold your water bottle, phone and wallet or some other miscellaneous items so you can easily carry it with you. 5. Free your handsNo need to hold the bottle with your hands when exercising. The logo on the belt is made of reflective material, which can highlight the reflection at night and make running at night safer.