Carry your camera gear and outdoor necessities with the Peak Design 45L Cloud Outdoor Backpack. This expandable roll top backpack features Ultra Cinch closure for maximum packing space. Multiple interior and exterior pockets store all your essentials, including a designated pocket for a 16-inch laptop or a 3L hydration bladder. The 3-part spring steel interior frame and ventilated, quick-drying back panel offer back and lumbar support. Key features include a laptop/hydration bladder pocket, expandable Ultra Cinch Roll Top, flex pockets on both sides, front flex pocket, back access, hydration pass-through, and a large rear panel with UltraZip zippers. The backpack is made of Terra shell 210D ripstop nylon, which is weather resistant and bluesign-approved. The front and bottom panels have waterproof and PFA-free TPU coating. Expand your packing capacity with the expandable top access via roll top and Ultra Cinch. The back panel is ventilated and quick-drying for added comfort.