Lightweight cycling, running or hiking hydration pack is exceptional for those short adventures. It is supplied by 1.5- liter reservoir, designed for quicker loading and refilling. It delivers 20% more water per sip, keeping you hydrated. When all you want is the water, this minimalist pack has you covered. With enough water for 2 hours and a safe zip pocket for keys and essentials, the HydroBak backpack is designed for those short adventures. Color: Black Weight: 0.33 pounds Dims: 12.6 x 8.46 x 3.94 inches Capacity: 1.5 liters