Camelbak Products Octane XCT Hydration Backpack, Parachute Purple/Royal Lilac, 100-Ounce Air Mesh back panel, Antidote reservoir Ultra-light 3-D Mesh harness with gel pocket and Slider Sternum Strap Stash pocket on waist belt for easy access to gel or essentials Designed to carry extra layers, ultra-light weather protection, trail maps, energy bars Front and back reflectivity