HydroBak® Looking for a better way to drink on-the go? The versatile HydroBak® is ideal for all sorts of activities and features a low-profile, comfortable design. Carries enough hydration for 1 to 2 hour outings. Features & Specifications • External zip pocket for keys and essentials • Secure Bungee Cinch System™ holds extra clothing • Low-profile design keeps pack stable and doesn’t interfere with helmet • Soft mesh harness is comfortable and breathable • Reflectivity for increased low-light visibility Specifications Capacity: 50 oz (1.5 L) Dimensions: 13.5 in x 8 in x 1.75 in (343 mm x 203 mm x 45 mm) Cargo: N/A Weight: filled 4.10 lbs (1.86 kg) empty .80 lbs (.36 kg)