Tamrac 5574 Expedition 4 SLR Photo Backpack (Black) Compact backpack perfect for any photographic outing Dual Wing pockets feature Tamracs patented Memory &amp; Battery Management System to identify available memory cards and batteries QuickClip tripod attachment system holds tripod centered and balanced while Tripod Foot Pocket holds two tripod legs secure State of the art harness system features Dual Density Comfort Pads and Air Flow Channels