The ProTactic 450 holds a larger outfit of 1-2 pro DSLRs, one with 70-200/f2.8 attached, 7-8 lenses and flashguns, and a 15" laptop. Its discreet styling makes it a good choice for urban photography. There are four access points: full access is gained from the rear, which increases security, but there’s a top flap and two side flaps to allow a camera with mounted lens to be quickly extracted. Five modular accessories are supplied – water bottle pouch, accessory case, tripod cup and two cinch straps – which can be placed anywhere on the bag where there’s a SlipLock attachment strap (the horizontal bands you see in the picture). An ActivZone system harness includes comfort lumbar pads, plenty of adjustment, and a removeable waistbelt for ease of packing or travel, and there are two small side pockets and a larger one under the top flap for small personal items or accessories.