All the packs in the CamelBak Octane series are made from ultra-light materials so they’re optimal for adventure racing, trail running or XC bike riding — anything where you need to move fast and minimize weight. The Octane LR moves the 2 liter Antidote™ Lumbar Reservoir down around your waist for greater comfort and stability — integrated lumbar compression prevents your hydration from sloshing around. External fill makes replenishing your water supply quick and convenient. On the front you’ll find dual overlapping pockets and a stretch mesh overflow for efficient gear organization. Stretch mesh pockets on the harness to keep nutrition, your smart phone or other essentials within easy reach when you’re on the move. For safety, we’ve added a whistle on the harness and reflectivity on both front and back.