Heavy duty, 1680 denier ballistic polyester and 1800 denier patterned polyester construction. Modular design allows for three different bag configur-ations. Top and bottom bag can be mounted individually or zipped together. Can easily convert from a strap mount to mount bag with additional optional mounting bases. Top Bag:. Built-In adjustable GPS pocket accommodates a variety of phones and GPS devices. Removable, replaceable map pocket. Expandable main compartment allows for an increased storage capacity. External zippered side pockets with zipper garages. Two sip tube and media access access ports. Hinged lid with underside organizer pockets allows easy access and organization. Two-Tone black on grey soft lining interior. Integrated carrying handle. Includes visor storage pouch, water bladder storage bag and a clear window rain cover. Bottom Bag:. Hideaway backpack straps. Organizer pocket. Two-Tone black on grey soft lining interior. Compatible with optional removable Tablet/iPad pocket, optional accessory pocket and removable map pocket.