Nathan QuickStart 2.0 4L (Liter) Hydration Pack with 1.5L Bladder, Front & Back Pockets for Essential Storage, Breathable & Moisture Wicking.

FUNCTIONAL HYDRATION: Our Hypernight QuickStart 2.0 4 Liter Hydration Pack provides you with the most efficient of both worlds. Equipped with a 1.5L bladder, 2 easily accessible front pockets, and extra storage, you’ll be able to have the ability to hit the trails for a hike or some walking
ESSENTIAL DESIGN: Made of moisture wicking stretch woven fabric & chafe free binding materials for maximum comfort plus, breathable mesh shoulder straps. Front storage for nutrition and phone fits most large format smartphones, front bottle pocket fits as much as 22oz flasks, and main back zipper pocket.
SIZING & FIT: One size fits most. Adjustable front and side straps for a great fit
SPECS: Weight without bladder: 7oz; Weight with bladder: 12oz; Storage capacity: 4 Liters (44 cu in).
INSPIRED BY THE JOURNEY: Nathan’s number of running essentials delivers on what matters most through intuitive design, comfort, quality, and smart storage, to assist runners give a boost to and make stronger their performance, mile after mile and year after year