A cheap, but reliable, trail running hydration vest or running backpack then check out our honest and very well informed Aonijie hydration vest review Extremely light backpack, weights 190g/6., 7oz, you don’t even notice there is a hydration vest on your back. 【5L Capacity & 9 Safety Pockets】The 5L sports hydration pack has 9 pockets to meet all your exercise needs and keep your belongings safe. 【Maximum Comfort】The hydration running backpack is adopt to premium nylon, polyester amd breathable mesh ,which is stretchy, sweaty and comfortable. AONIJIE 10L Hydration Vest, Running Vest for Men & Women, Lightweight Hydration Backpack for Trail Running, Breathable Durable Design From Amazon.US🏃🏃♀️ #AONIJIE #UTMB #TrailRunning #TrailRunningPartner #TrailRunningBackpack #RunningJacket ENOUGH ROOM WITH 8 POCKETS ] Our hydration backpack has 6 pockets on the front which fits keys, cell phone up to 6.8 inches, ID, water bottle & small first... You can store all your small items like vacuum cups, key, soft flask, hydration bladder, phone and cash etc. Sufficient capacity provides the possibility for you to replenish water in time when you run. AONIJIE Hydration Pack Backpack 5L Adjustable Ultralight 【Wide Application】Our running vest can accompany your Running, Jogging, Marathon, Climbing, Hiking, Cycling, Walking, Backpacking, Traveling, etc.