This product helps you stay hydrated with its leak-proof pack bladder for any of your outdoor activities, such as cycling, climbing, camping, hiking, etc.
When there's no need for a bag, It is more like a carrying vest for minimal gear. Your basic items are distributed between the front and rear. The backpack construction comfortably wraps your body without hindrance. More easily and comfortable for your outdoor activities.

Features:

Lightweight For Running: 2.5L race vest with 2 pcs 500ml water bottles, the backpack weight is 4.06oz/115g 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.
Fit You Well: Ergonomic designed vest-shaped bag comes with an adjustable waist strap and high elastic chest strap.
Multiple Storage Compartment: There are enough pockets and pouches to store items like cell phones, keys, thin raincoats, 500ml soft water bottles, and other items for outdoor activities.
Comfortable Fit Vest Pack: 75% nylon,25% spandex. Completely chafe-free for comfort while running, shorter length delivers a close fit. Soft mesh on back and shoulder straps maximize breath-ability.
Wide Applications: Aonijie running backpack aims to accompany your trip of Running, Marathon, Cycling, Jogging Firmly shape your body without reducing too much volume and slowing down.

Specifications:

Brand: Aonijie
Color: Orange Red, Mint Green, Black blue
Capacity: 5L
Material: 75% nylon, 25% spandex
Weight: 115g
S/M: Chest circumference 77-86cm/30.3-33.8in
M/L: Chest circumference 83.5-92.5cm/32.8- 36in
L/XL: Chest circumference 89.5-98.5cm/40-45 in

Package:

1PCS Hydration Race Vest+2PCS 500ML water bottles

Ultralight Hydration Pack Bag CYCLING | HIKING | CLIMBING