For runners who prefer to carry their water in hand, or for adding hydration capacity to the Duro vest-pack, the Osprey Duro Handheld Hydration Bottle offers a minimalist yet comfortable design that works on both left and right hands.. . . . . Included Osprey Hydraulics 250 ml soft flask. Soft flask-stabilizing pouch. Ambidextrous-handed fit. Small zippered mesh pocket. Small stretch mesh shove-it pocket. MAIN: 70D x 140D Nylon Triangle Ripstop. ACCENT: 320Gr Nylon Stretch Mesh. BOTTOM: 200Gr Nylon Stretch Mesh. VOLUME: 0 IN3 / 0 L. DIMENSIONS: 7.9H X 3.2W X 2.8D IN.. WEIGHT: 0.11 LBS.