Camden Gear Zeyu Hydration Backpack Running, with 1.5/2L Water Bag Pack Black/Blue WILL FIT YOU PERFECTLY: Adjustable shoulder/chest straps. Will fit chest sizes from teenagers / kids with 27" up to adults (men and women) with 50" chest size. The chest straps makes sure it doesn't bounce when you move.Multifunctional for camping,hiking,bicycling, fishing and other sports.Makes a great gift too! WATER RESISTANT AND DURABLE: The main compartment is covered with our own diamond TPU&EVA material which serves two functions.water bladder Certificate:FDA,BPA FREE,LFGB REPLACEABLE 50Oz. BLADDER: Includes a 1.5 Liter/50 Oz. BPA Free bladder which keeps you hydrated. It also keeps the water fairly cool. and includes a wide screw cap so you can add ice cubes for an even cooler drink. OUR GUARANTEE: If for any reason you are not 100% satisfied with your Camden Gear Hydration Pack, please let us know and we will immediately refund your purchase price - no questions asked.