The black Weekender Camera Backpack from Sirui is a multi-purpose photo backpack with a side opening for easy access to your equipment and a convenient, removable camera insert. The expandable top compartment is suitable for travelers or weekend shooters. If you need more space, the upper compartment expands to hold an amazing 21L (1281 in3). The ergonomic shoulder harness system makes the backpack feel light and comfortable even when loaded with gear. SIRUI's air run ventilation system keeps your back cooler and dryer. To use the Weekender as a conventional backpack, you simply need to remove the camera insert and fold down the divider. Water-resistant tarpaulin on the top and bottom surface helps keep moisture out of the backpack. For added security, the backpack features SIRUI Twiz-Lock security system that prevents thieves from unzipping the backpack.