The Ultimate Direction 2L Reservoir II is essential for long days on the trail, now updated with improved material for better tasting fluids and new bite valve. 2 Liter / 70.5 fl oz capacity. Wide-mouth opening for easy fill and cleaning/reversing. Slide rail top closure prevents leaking and provides a positive top hold. TPU tubing (no PVC) drapes better over the shoulder while still providing strength and resistance to kinking. Removable-fit tube connection makes refilling and cleaning easy. Silicone bit valve for easy water flow. Fluid capacity measurement lines along the side. WEIGHT 123 g / 4.31 oz. FLUID 2 L / 70.5 oz.