Mardingtop 75L Molle Hiking Internal Frame Backpacks with Rain Cover for Camping,Backpacking,TravellingMaterialThis 75L backpacking backpack is made of 600D PolyesterYKK ZipperRain cover included Hydration CompartmentThis hiking backpack with hydration compartment and can hold a 3 Liter bladder , the tube is fed through the top side of the bag near grab handle MOLLE WebbingThis is a military tactical backpack that You can hang on tools,trekking poles,tents,sleeping bags,and other outdoor gear by the molle systemA rifle also can be hanged with the side