Multifunctional Storage Design: Featuring 6 external pockets, this compartment is perfect for holding various small items like a vacuum cup, keys, wallet, phone, and cash. You'll find extra space at the front for a second bottle, wallet, keys, and other small belongings. In the back, there is enough room for a spare bottle, headlamp, buff, and more.
Comfortable Fit Vest Pack: Fully adjustable shoulder and chest straps that guarantee the perfect fit, keeping the pack from bouncing while running. Designed with a unique padded back section to allow airflow between your back and the pack.Soft mesh on back and shoulder straps maximize breath-ability.
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.
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.
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.