AONIJIE Hydration Vest Pack Backpack 5L Marathoner Running Race Hydrationnylon Imported Lightweight For Running: 5L race vest with 1. 5L Water Bladder, the backpack weight is 190g 6. 7oz super light, reducing much of the load during the running. When it comes to running, the shorter you plan to spend on the trail, the lighter pack you'll need. Design for middle or long distance running. Multiple Storage Compartment: Designed with 9 exterior pockets, you can store all tiny items such as vacuum cup, keys, phone and cash etc.