Running vests

so it must fit like a tighter t-shirt and not bounce anywhere when running downhill. Therefore, choose the size based on your chest circumference and adjust both straps, not just the bottom one. A volume of around five litres is enough for a half-day run with a jacket and food; for a full-day route and mandatory gear, expect double that. Front pockets for soft flasks are more practical than a reservoir because you can see how much you have left. Try it on loaded and in motion.