The Evolution 9 Sling Backpack offers unprecedented versatility for quick access to photo gear. With its unique harness system, the Evolution 9 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 9 is perfect fit for carrying a pro DSLR with a grip and up to an 8.75" lens attached, several additional lenses, and a flash. The back pocket holds most 17.3" screen laptops.Triple Access SystemTriple Access System allows access to gear through either side door when the pack is still worn over one shoulder or through the front panel when the pack is removed.Convert to a Sling PackTo 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.Foam-padded Computer PocketIn back, a completely foam-padded laptop pocket holds most 17.3" screen laptops and others up to 17.5" x 11 x 1.5" in size.Foam-Padded Top CompartmentA large foam-padded top compartment provides storage for a light jacket, lunch, or other photo accessories. A mesh pocket in the back keeps small accessories separate and secure, while a Windowpane-Mesh pocket on the inside door panel holds additional small items.QuickClip Tripod Attachment SystemA tripod can be cradled (centered and balanced) securely with Tamrac's QuickClip tripod attachment system while the lower Tripod Foot Pocket holds two tripod legs secure. Side Pockets and Rain CoverEach side has a zipper-closing pocket for accessories like a phone or iPod. The right pocket contains a removable rain cover, which can be slipped over the pack during extreme weather.