Gregory Arrio 18 Pack Empire Blue One Size. The ventilated suspension and breathable shoulder straps keep you cool and all your essentials are at your fingertips with the streamlined organization. Specifications for Gregory Arrio 18 Pack: Manufacturer: Gregory Size: One Size Gender: Unisex Weight: 1.39 lb Pack Application: Backpacking Capacity: 1098.4 cubic in Pack Volume: 18 liters Body Material: 210D Honeycomb CryptoRip HD Nylon with PFC-Free DWR Age Group: Adults Features of Gregory Arrio 18 Pack FreeSpan suspended open-air mesh backpanel keeps you cool and comfortable on the trail Top loading access with secure drawstring closure 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 QuickDry 3D Hydro Reservoir (reservoir not included) Front bungee system with reflective webbing loops Top zippered quick-access pocket Swing around side zippered stash pocket for quick storage and key clip attachment Side stretch mesh pocket Custom ComfortGrip molded zipper pulls Package Contents: Gregory Arrio 18 Pack Gregory 136968-7409: Arrio 18 Pack Flame Black One Size Gregory 136968-1129: Arrio 18 Pack Brick Red One Size Gregory 136968-7411: Arrio 18 Pack Empire Blue One Size Gregory 136968-7411: Arrio 18 Pack Empire Blue One Size