The Camelbak Octane XCT is upgraded for 2011 & is perfect for cross country cycling or trail running with a supremely light & comfortable design. Features ultra light 70 D Ripstop pack body, Air Channel back panel, reservoir access through the front of the pack, air mesh ventilated harness, extra long waist belt pockets, secure essentials pocket, bungee overflow storage & front & rear reflectivity. Weight exc. reservoir: 320 g. Hydration: 3.0 Litres Antidote with Quick Link System. Total capacity: 6.3 Litres.