Capacity - 50 oz (1.5L) The HydroBak is CamelBak's most economical hydration system, built for the rigors of daily use. Ergonomic in design, this versatile system is perfect for all tasks. Holds enough water for 1-2 hours of activity. Quick-release shoulder straps unclip for easy removal Closed cell insulation and neoprene tube cover keeps water cool or warm for hours External zip pocket holds your essentials Tough, abrasion-resistant exterior OMEGA Access Port for easy filling, cleaning and ice addition Design makes it perfect for people with smaller body frames NSN 8465-01-541-7956