TRIWONDER Reflective Running Vest Hydration Race Vest Hydration Pack Backpack Polyester Net + Nylon Spandex Yarn Imported WATER SUPPLEMENT -- Water Bottles equipped, pressure-tolerant and leak proof. Drinking the water directly whenever you need without taking your running vest off or stopping your steps. Convenient trial running backpack outfit BREATHABLE +SAFE -- Soft and thin mesh of hydration vest for optimal comfort and absorb sweat efficiently. Reflective warning strip make you more safely at night running. The race vest is the supporter for your comfortable sport journey LIGHTWEIGHT + ADJUSTABLE -- Functional straps hold the ultralight hydration pack snugly without slipping or feeling overloaded, help cycling backpack hug your body nicely, keeping the running vest from moving as well as reducing the burden SUPER POCKET -- You can carry everything you need with the water backpack. Super pocket design that your water bottle, phone, keys, foods can easily stored in the front pack pockets, and bladder or other items can be held in the back one EXTENSIVE APPLICATIONS -- The waterproof and sturdy running water vest aims to accompany your trip of Jogging, Running, Marathon, Hiking, Climbing, Cycling, Walking, Backpacking, etc. Triwonder hydration backpack is always be there for you