1. -The front outside surface is made of water-resistant nylon material, so youll worry about your belongings getting wet or moist in rainy days.2. -(Bottle not include)There is an adjustment rope on the water bottle holder mouth, which efficiently keeps your bottle stable and safe while running or jogging.3. - separate zipper pocket and a back pocket are convenient to keep your iPhone X max/8s Plus/7 Plus, keys, card, wallet, cash, etc.4. -The adjustable strap fits comfortably around your waist, and the buckle closure makes it easy to take on and off.5. -Reflective strips on the storage bag can effectively make you seen in the dark, it is a nice secure design for night running; while the back mesh pad allows it breathable and keeps your waist dry and fresh while exercise.