TRIWONDER Running Backpack Bag 18L Hydration Trail Running Backpack Climbing Bicycle Cycling Marathon Vest Trail Ventilation Lightweight One (Black

A large-capacity backpack with a generous capacity of 18L, perfect for running and trekking. Lightweight design weighs only 500g, so it won't weigh you down even when you're out for long periods of time. Uses highly breathable fabric to reduce stuffiness. Mesh material on the back ensures breathability Adjustable straps and belt allow for a customized fit Equipped with a pocket for smartphone storage, designed for easy access This trail running backpack has a generous 18L capacity and is perfect for long runs. It is lightweight, has excellent breathability, and features a design with an excellent fit. The adjustable shoulder strap and waist belt ensure a comfortable fit. You can easily store your smartphone and drinks in the side pockets. Made of high quality fabric, it is durable and functional. This backpack is useful for various outdoor activities such as mountain climbing, cycling, and marathons.