Adjustable front and side straps for a perfect fit Front bottle pocket fits up to 22oz flasks Front storage for nutrition and phone - fits most large format smartphones Includes 1.5L Hydration Bladder Main back zippered pocket for extra layers and other running essentials Soft perimeter binding prevents chafing Storage capacity: 244 cu in / 4L Weight w/o bladder: 7.2oz / 204g Weight with bladder: 12.4oz / 352g Includes 1.5L Hydration Bladder, Front storage for nutrition and phone - fits most large format smartphones, Front bottle pocket fits up to 22oz flasks, Main back zippered pocket for extra layers and other running essentials, Adjustable front and side straps for a perfect fit, Soft perimeter binding prevents chafing, Storage capacity: 244 cu in / 4L, Weight with bladder: 12.4oz / 352g, Weight w/o bladder: 7.2oz / 204g