Bullet Points: 1Back Water Bottle Pocket: The large-capacity Running Vest Bag with a zipper can hold a 7.5-inch mobile phone, keys, and other valuables, and the back design can hold a 1000ml water bottle. 2Lightweight & Breathable: Running Backpack Vest fabric is lightweight and breathable, so you won't feel stuffy when you wear it. Ventilation holes allow excess heat to escape. 3Optimized Design: We only use lightweight materials to create a Running Chest Pack that comfortably hugs your torso without getting in your way. Our focus is to minimize disruption to any sport. 4Reflective Design: The Running Phone Backpack is designed with high-brightness reflective strips on the front and back, making it safer for you to run and ride at night. 5Ultra Light Design: Say goodbye to bulky packs with the ultralight Running Hydration Vest that fits comfortably over your shoulders and rests on your shoulder blades. Description: We know the importance of feeling unrestricted when running. Our running chest pack is body-fitting and sticks to your every move for fluid, free movement. Features: 1. Large capacity water bottle bag design on the back. 2. Light and breathable, comfortable to wear. 3. The reflective strip design ensures the safety of running at night. 4. Ultra-thin, ultra-light, no interference to movement. Specification: Name: Running Backpack With Phone Holder Weight: about 155g Material: mesh cloth Please refer to the size chart for specific product sizes Function description: It can be installed with small items such as mobile phones, bank cards, towels, water bottles, and change. Features: elastic close-fitting, breathable, lightweight, reflective strip design, etc. Package List: Running Phone Backpack * 1 Notes: Due to the lighting effects and shooting angles, the color of the item and that shown in the picture might have a nuance. Due to manual measurement, there might be a tolerance in the product size.