Hydration bagpack Material:600D OxfordWater Bladder Bag Capacity: 2.5LNeoprene tube cover keeps water cool for hours .Bite Valve Cover keeps Bite Valve clean from dirt.Constructed by waterproof 600D Oxford.A switch on/off bite valve, convenient for control the flow of water.Adjustable shoulder strap and chest belt, suitable for heavy carrying.Equipped with a tube with a bite valve to drink, so you don't need to hold it to drink.one for hydration bladderPackage includes:1 X Cycling Backpack with Water Bladder BagFeatures:PVC material and Polyester shell fabric and liningGreat ergonomic and stylish designMore breathable, air ventilationDurable and light-weighed materialGreat fixation with two adjustable shoulder, chest and waist strapsErgonomically padded mesh cover for extra comfortIdeal for hiking, biking, camping, running, travelling and etchydration baghas 2 layer cargo design one for hydration bladder and the other for snacks or extra carring thingshas water bladderhold 2.5l to 3 litresHas adjustable shoulder trap and chest belt suitable for heavy caring Have oxford material hence strongequipped Drinking pipe with bite valve to drinkcan me used by cycling and militaryhydration baghas 2 layer cargo design one for hydration bladder and the other for snacks or extra carring thingshas water bladderhold 2.5l to 3 litresHas adjustable shoulder trap and chest belt suitable for heavy caring Have oxford material hence strongequipped Drinking pipe with bite valve to drinkcan me used by cycling and military