Inov8 Race Pro 12 Performance Pack H2Orizontal Easy Blader Access - The horizontal bladder is easily accessed under a flap on the back area and can be tap filled in situ. Left & Right Bladder Pipe Outlet - Pipe outlets on both sides of pack allows pipe to be placed around waist or on the shoulder. H2Orizontal Hydration System - Unique patent pending Horizontal bladder fits around lumbar region adding support and stability while being easily accessible. Weatherproof Waist Pocket - Easily accessible weatherproof waist pocket. High viz Strap Webbing Day and night high visibility webbing on shoulder strap with reflective strip.