The PB-3500 is a hardcase style back pack with a padded interior. The case comes with (1) PB-B6 pouch, 3 small removable dividers, 1 removable flexible divider and 1 divider snake that can be configured to your liking.The backpacks straps can be held down with the strap saver for when the Backpack is being transported with other gear or stuffed into an overhead compartment on an airliner.Porta Brace hard cases are watertight, have a pressure relief valve, easy to operate latches, and a comfortable hand grip. They are constructed with a high-performance hard-resin material reinforced at the corners. They are ideal for video, audio, and photographic equipment transportation and protection. They are lighter than many comparable brands and save you shipping costs.