The Hi-Vis Flow is a slimline and lightweight pack aimed at cyclists, runners or anyone else needing an efficient hydration system when on the move. It comes with two zipped side pockets for your phone, keys, multi-tool, energy bars or other small bits and pieces. The hydration bladder is two litres and has a screw cap filling port for easy cleaning. Be seen and be safe! Also available in hi vis orange and in black.