The Evolution 6 offers unprecedented versatility for quick access to photo gear. With its unique harness system, the Evolution 6 can be carried three different ways - as a backpack or as a sling pack worn over the right shoulder or the left shoulder. With Tamrac's Triple Access System™, there are also three way to access photo equipment - through the front door and through two side doors. The Evolution 6 is perfect for a DSLR with up to a 5½" lens attached, an additional lens or two, and a flash. To convert to a sling pack, simply cross-connect a single shoulder strap (red to red for carrying on the right shoulder or blue to blue for carrying on the left shoulder). The other shoulder strap is easily tucked away in Tamrac's Tuck-A-Way™ harness system.