Hydration System:Bladder compartment with hanging system,Aonijie running vest compatible with 2L bladder (not included);2 Front flask pockets with secure loops,Make it easy to drink and stays balanced when you run.
Comfortable Fit Vest Pack: Equipped with adjustable shoulder and chest straps to ensure an ideal fit, preventing movement while you run. Features a specially designed padded back area to promote air circulation between your back and the pack. The soft mesh material on the back and shoulder straps enhances breathability.
Multiple Storage Compartment:Designed with 6 exterior pockets, you can store all tiny items such as vacuum cup, keys, wallet,phone and cash etc. There's ample room upfront for another bottle, wallet, keys, and other small items. The rear storage is big enough for backup bottle, headlamp, buff and etc.
Lightweight For Running: 5.5L race vest only, the backpack weight is 8.82oz/250g 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.
Fit You Well: Ergonomic designed vest-shaped bag coming with adjustable waist strap and high elastic chest strap,two sizes for your option.This backpack can be used for more than running and hiking.It is suitable for almost all outdoors activities such as running, riding, camping, marathon, etc.