Macna Utility Mubp Backpack - BlackMacna Utility Mubp Backpack The MUBP is a waterproof, 25 litre utility backpack with Night Eye fabric, and P. A. L. S. to expand baggage capacity. The main compartment of the MUBP 1 backpack can be fully zipped open to gain easy access to its contents without having to fumble around blindly. Elastic pockets are fitted at the back and sides of the main compartment. When closing the main compartment, you? ll find a waterproof pocket with a roll top