No matter whether trail running, running, marathon or on the bike, the hydration backpack is equipped with the dual hydration system, which makes it the ideal companion for short and long distances and tours. Runlight Hydration Backpack Running Vest for Men Women Hydration Pack Hydration Vest Custom Hydration Pack Cycling Running Hydration Backpack With Water 5L Cycling Hydration Pack Lightweight running backpack hydration vest, suitable for bicycle marathon hiking trail, ultra-light and portable ULTRA LIGHTWEIGHT: Ultralight hydration backpack with wide and breathable shoulder straps that effectively distribute weight, reduce power consumption. Whether you're hiking, biking, or running we've reviewed the best hydration backpacks on the market. Drink easily with these top-rated models Ample storage space, Utobest 5L running vest has 6 pockets, 1 separate hydration bladder compartment, 1 main compartment, 2 front pockets for soft bottles, 1 zip pocket (shoulder strap position), reflective stripe design front and back, safer for marathon, trail running in dark conditions