Review on YAPJEB 5.5L Hydration Pack Backpack: Ideal for Marathon Running, Race Hiking & Outdoor Activities by Raffy Baer

material is incredibly comfortable and breathable, with a variety of adjustment options to help you find the perfect fit. There are so many pockets in this backpack that we think these pockets are perfect for everything we need. One of the pockets even has a whistle, which can be very useful in critical situations. One thing really confuses me: does it have a water bag inside? Because there is no water bag in my kit.