All of the CamelBak Octane series packs are made from ultra-light materials so they’re good for adventure racing, trail running or XC bike riding – anything where you need to move fast and minimize weight. The Octane XCT takes this approach to extremes by stripping the pack down to the basics. Inside you’ll find the 3 liter Crux Reservoir, which drops in behind the back panel. Outside CamelBak added a single vertical zip storage pocket on the front and two stash pockets on the waist belt and harness so you can keep essentials close at hand. For safety CamelBak added reflectivity front and back and a whistle on the harness.