Not just for ultra runners, these hydration vestpacks provide light weight, comfortable hydration and compact gear storage solutions for trail runners tackling any distance where aid stations are few and far between or non-existent. Capacity ranges from 15 liters of storage space and a 2.5 liters of reservoir space in the Duro/Dyna 15 to more streamlined options including the 1.5 liter storage/1.5 liter reservoir Duro/Dyna 1.5. Tired of running with bulky, sloppy hydration packs that were never made for runners in the first place? Or leaving the water, calories and backup jacket at home? Stop doing that. MSRP: $90-$140. //