Tamrac 5577 Expedition 7 SLR Photo Backpack (Black) he Expedition 7 is a large pack that accommodates a full complement of photographic equipment 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 and dual-pivoting waist belt