The CamelBak Octane 22 LR Hydration Backpack is an ultra-light lumbar-based reservoir any adventure. The Octane has lots of room for gear as well as water. The Octane features tool attachment loop, safety whistle, quick-stash overflow storage as well as an essentials pocket to keep your gear stowed and safe. The ultra-light materials, lumbar compression and the lumbar reservoir means it makes for an easy, all day carry.