The camelbak ultra pro hydration running vest is suitable for long distance training and elite level racing and comes with two lightweight collapsible quick stow flasks with a capacity of 05l and a one piece silicone bite valve ensuring rapid hydration it is made using 3d ventilated mesh material for excellent ventilation and a cool feel and offers 9 pockets for fuel water extra layers smartphone and all your run essentials to keep you visible in low light conditions the vest features re