This 1.5L. hydration bladder vest provides a low-profile, minimalist way to comfortably wear your water and bring along other essential items on your journey. Includes 1.5L. bladder. Front storage for nutrition and phone, which fits up to iPhone 7 Plus. Main back zippered pocket for extra layers and other running essentials. Adjustable front and side straps for dialing in a perfect fit. Soft perimeter binding prevents chafing.