Naneu Pro ECHO-BK Military Ops Messenger Pack Military Ops Series, made of water-resistant 1680D rip-stop nylon with heavy-duty zippers. The ECHO features a cell phone compartment, 11 pockets for organizing accessories, a compass, plus a dedicated audio pocket with headphone grommet and a single over-the-shoulder strap that allows for easy rotation from back to front. The Military Ops ECHO offers the utmost in camera portability and security. The Messenger style ECHO backpack is also convertible to a standard daily messenger pack. The ECHO's camera removable insert will accomodate a DSLR with up to a 5-inch long lens attached, plus 2 more lenses and a flash.