This backpack is a lightweight trail  belonging to the Mont Blanc series. Aonijie is an official partner of UTMB.  This 4L capacity is suitable for trail running under 50km. It features dynamic fit and stable constriction. The direct - drinking water bottle design enables quick hydration, and it comes with 2×500ML water bottles. Lightweight is its advantage, weighing approximately 144g (L size) to boost speed in the mountains. The pole - bag mounting allows for easy access, while the back breathable mesh wicks moisture to keep the back dry. With multiple compartments for stable storage, it is suitable for various sports such as trail running, mountain climbing, hiking, and fastpacking