The Circuit is a lightweight running vest, that still carries enough supplies to bonk-proof your long run. The included Antidote reservoir holds 1.5 liters of water and two pockets in the front offer storing space for extra water bottles. All of your essentials are close at hand: a sweat-proof pocket holds your phone, card and keys, and a smaller compartment stretches to store gels or snacks. The dual sternum straps provide a snug, adjustable fit, and the external-fill design lets you top off your water supply without taking the reservoir out of your pack - a crucial time-saver on the trail.
1,5L Antidote® reservoir: