The ACPRO4000, yellow on the inside, black on the outside, and tough all over! This is an equipment carrying powerhouse. Superior quality as this backpack is made with a tough water-resistant nylon exterior. It also comes with a built-in, rain cover that opens easily. This is perfect if you’re working on location and caught in a rain storm. Well-padded to hold fragile equipment such cameras, lenses, tools, computers, tablets, breakable items, or any portable device that fits within the interior dimensions. It is perfect for moving items to-and-from trade shows. The trolley makes it easier to carry the items to-and-from locations as well. The retractable wheels come in handy when walking in buildings, driveways and any walkway. Airports, train stations, and bus stations are easier to walk through. If using this backpack outdoors, whether hiking or walking outside, the shoulder straps can be used to carry equipment easily as well. An adjustable harness system allows the bag to be tailored to your body, and the sternum strap keeps you balanced while walking. Inside, there are multiple movable Hi-Vis Yellow dividers that can be configured to fit your gear, and help illuminate the interior when in low light.