The Mach 5 with a D3O® back protector sewn in to the back panel is OGIO's first street riders pack with incorporated advanced back protection. The Mach 5 D3O® sports all the same features of the Mach 5, making it the most fully outfitted Mach bag ever built. Equipped with a sewn in D3O® Level 2 back protector - D3O® protectors have been developed to be used for protection from blunt impact. Streamlined molded exterior is water-resistant and will not deform from wind shear. Shoulder gasket conforms to body and increases aerodynamics. Bolstered back foam profile increases air ventilation. 360-degree reflective logo and safety piping. Removable fleece-lined hip accessory pouch. Off center removable hip belt won't scratch gas tank. Large main compartment with adjustable load divider and multiple interior storage compartments.