The PM ROLLERBACK LARGE BAG is convertible. Extend its handle for use as a rolling bag, or reveal the harness to convert it into a backpack. The Rollerback's spacious interior and numerous pockets hold your camera gear, accessories and tablet or laptop computer for safe transport. A convenient tripod carrier is located on the outer, front of the bag. Attachment ports on the outer sides are great for connecting PM lens pouches and other accessories. The main interior camera compartment is completely removable from the Rollerback so you can use it for carrying non- photographic items as well.