Description: 【Hydration Vest Backpack】: Designed to accommodate a 2L hydration bladder (not included), this running vest allows for quick hydration during medium to long distance runs, making it an ideal companion for and trail running 【Material and Design】: Crafted from lightweight polyester fiber, this vest ensures comfort while being sturdy enough to withstand the rigors of outdoor activities 【Multiple Pockets】: Featuring 10 front pockets, the backpack provides ample space for essentials such as water bottles, keys, phone. The back compartment is ideal for storing like water bladder 【Ergonomic Fit】: The vest is designed with an ergonomic fit and adjustable chest straps to ensure a snug fit that minimizes bouncing during runs or other activities 【Versatile Use】: Beyond running and hiking, this backpack is also suitable for various outdoor activities including cycling, climbing, trekking, and marathons. It comes with two 500ml soft water bottles included in the package Specification: Material: Polyester Size Chart:Length 44cm/17.32inch, Bust 78.5cm/30.91inch (chest circumference 78cm-86cm/30.71inch-33.86inch) Package Includes: 1 Hydration Vest 2x Soft Water Bottles Note: Please allow slightly errors due to manual measurement and different monitors.