NathanQuickStart 2.0 4 Liter Hydration Pack with 1.5L Bladder

FUNCTIONAL HYDRATION: Our 4 Liter Hydration Pack keeps you moving in total comfort. Equipped with 2 water-resistant pockets, 2 new kangaroo pockets, and a new shape for maximum breathability and enhanced storage, it's the perfect race day vest! ESSENTIAL DESIGN: Made of moisture wicking tapered back panels & chafe free. New side pocket for easy access, new vertical pocket for larger items like trekking poles, and 2 20oz hydration Soft flask with ExoSpine for stability, long hose and mouthpiece. SIZING & FIT: Unisex and fits different body types. Designed to fit like a second-skin with chafe-free fit & form. 20% lighter and more breathable than the Krar and Howe Vests. Also available in women's specific sizing. SPECS: Weight without bladder: 6.1oz; Weight with bladder: 12.0oz; Storage capacity: 4 Liters (244 cu in). Comes with 2 20z hydration soft flask. INSPIRED BY THE JOURNEY: Nathan's collection of running essentials delivers on what matters most through intuitive design, comfort, quality, and smart storage, to help runners enhance and improve their performance, mile after mile and year after year.