Quality Assurance - Our 100% money-back guarantee and excellent customer service provide support for each product during one month. If you encounter any problems during the use of this hydro vest, please contact us immediately to allow the return service. Comfortable & Reliable - Adjustable straps help adjust the hydro running backpack to your needs. For bikers runners, the water pack fits perfectly between most shoulder blades, as to not catch on anything while biking or even hiking running. The design is not a traditional hydration pack because it centers the weight on to your back rather than your shoulders, as more traditional hydration packs do. Versatility - Frees your hands while drinking water, this hiking backpack with water bladder is your perfect choice for short trip, camping, bike riding, walking, mountaineering, kayaking, skiing, hiking, snowboarding, A decent Holiday Gift for families and friends youth kids womens and runners who love outdoor sports. 2L Water backpack with bladder - BPA-Free, taste-free, and odorless. Durable, kink-free sip tube and push-lock cushioned bite valve, fully detachable bladder and hose, easy to remove and clean. Moreover, it equipped with a lifesaving whistle. Satisfy Your Thirst For Adventure : This Lightweight Hydration vest packs are designed for riding running mountain climbing hiking ,with 16.9"(H) x 8.7"(L) x 0.39"(W) in size and 15.6 ounces in weight, and this hydration backpack comes with two pouches on the width shoulder straps to store your water botteles, phone or other essentials.