Light weight, form fitting 5L hydration pack designed to move comfortably with the body while trail running, works great for mtn bike adventures or high activity sports. Great for any active sport, this pack carries the essentials comfortably. Stretch fit around the body won't bind or pinch. Twinlink sternum straps help secure the pack for stability during dynamic movement. Weight: 330. Pack weight (LB OZ)10.22 oz. Dimensions 44 x 21 x 12 cm. Pack volume (CI)427. Pack volume (L)7. Pack weight (G)290. Material: Mesh.