The Lowepro Flipside 400 AW Backpack (Black) is a 600 denier polyester pack with a padded interior designed to carry a pro DSLR camera with a lens attached, plus an additional body, 4-6 extra lenses, a flash, and accessories. Depending on how much extra gear you want to fit, your attached lens can be as large as a 300mm f/4, a 70-200mm f/2.8, a 150-600mm f/5, or even a 300mm f/2.8. It features a back-entry compartment that provides easy access to camera gear when setting up (keeping the harness off the ground and clean of debris), plus extra security when on the move. Adjustable dividers allow custom organization inside the compartment. There is a front zippered organizer pouch, four clear mesh pockets on the camera compartment flap and built-in memory card pockets on inside panel.The backpack has a Hideaway Tripod Holder that secures a tripod or monopod to the backpack, a built-in All Weather Cover, and Hypalon attachment loops for SlipLock compatible products. It is carried by a carry handle, contoured backpack straps with back pad for added comfort and to wick away moisture, and a mesh covered padded waist belt.600D polyester backpack with padded interior designed to carry pro DSLR camera with attached lens, 4-6 extra lenses, a flash, filters, three memory cards, and power supplies.Depending on how much extra gear you have, attached lens can be as large as 300mm f/4, 70-200mm f/2.8, or 150-600mm f/5. An attached Nikon 300mm f/2.8 will fit with hood reversed if you remove about 2/3 of interior dividers and reduce number of extra lenses.Back-entry compartment provides easy access to camera gear when setting up (keeping the harness off the ground and clean of debris), plus extra security when on the moveAdjustable dividers allow custom organization inside the compartmentPocketsFront zippered organizer pouchFour clear mesh pockets on camera compartment flapBuilt-in memory card pockets on inside panelHideaway Tripod Holder secures a tripod or monopod to the backpackBuilt-in All Weather CoverHypalon attachment loops for SlipLock compatible productsCarrying optionsCarry handleContoured backpack straps with back pad for added comfort and wicking away moistureMesh covered padded waist belt