The Evolution Messenger 4 is a versatile,slim-profile messenger bag that converts from a camera bag to a briefcase. A DSLR with a lens attached, a flash, and 2 to 3 additional lenses (including a 70-200mm f/2.8) are protected inside a foam-padded compartment called the "shuttle", which features adjustable, foam-padded dividers. Behind it, a foam-padded compartment holds most 15.6" screen laptops. A zippered top opens away from the body for fast access to a camera with a lens attached. Gear can also be accessed by unbuckling and lifting the top flap. To convert it to a briefcase, simply remove the shuttle from the bag using the handles. The main compartment can be filled with files, paperwork, or other necessary business items. A laptop can still be carried in the laptop compartment. To convert it back into a camera bag, just slip the shuttle back in.