specification: New hydration backpack with 3.0L water bladder included. Features 2 front pockets in addition to water bladder compartment. Made from tough 600D polyester fabric. Additional Molle webbing makes this little hydration pack even more versatile. Bladder holds 3.0L and features a Big Mouth opening and a matching covered sleeve for the drinking tube. Adjustable shoulder/chest/waist straps , The chest straps prevents bounce from exercising and biking Extendable bite valve makes it easy to reach Easily cleaned by using water to rinse out the bladder Roomy Storage Pockets to safely carry your belongings along with you 100% Satisfaction Guarantee: If for any reason you are not 100% satisfied with this pack, please contact us as soon as possible ,and we will immediately respond and give solutions to you . Attention please: This tactical backpack is CUSTOM DESIGNED BY Seamand,All of our product have our own brand Seamand packaging.