Our View – Gregory Arrio 18: The Gregory 18 is a stramlined, close fitting backpack that is ready for adventure. The ventilated suspension and breathable shoulder straps keep you cool, and all your essentials are at your fingertips with the streamlined organization. Specifications – Gregory Arrio 18: Material - Body: 210D Honeycomb Cryptorip HD Nylon With PFC-free DWR Dimensions - 17 x 52 x 27 cm Rain Cover Weight - 0.041 kg Max. Carry - 6.8 kg Volume - 18 L Weight - 0.63 kg FreeSpan suspended open-air mesh backpanel keeps you cool and comfortable on the trail Perforated, breathable shoulder harness with built-in hydration routing and sternum strap with integrated safety whistle Internal hydration sleeve with SpeedClip hydration hanger compatible with our quick-dry 3D Hydro Trek Reservoir (reservoir not included) Custom fitted raincover included Front bungee system with reflective webbing loops (18L) Top zippered quick access pocket Side zippered stash pocket for quick storage and key clip attachment Side stretch mesh pocket Custom ComfortGrip moulded zipper pulls Gregory Arrio 18