Includes 1.5 liter hydration bladder; Front storage for nutrition and phone - fits most large format smartphones; Front bottle pocket fits up to 20oz flasks; Unique geo-reflective print for added visibility in low-light conditions; Main back zipper pocket; Adjustable front and side straps for a perfect fit; Soft perimeter binding prevents chafing; One size fits most; Storage capacity: 244cu in / 4L; Weight with bladder: 12.4oz/352g; Weight w/o bladder: 7.2oz/204g