Brand new, never used. Size medium. Flasks are included and attached to the vest but are tucked away in the pockets. Lightweight minimalist hydration vest for your long runs Coated ripstop fabric is hardwearing and quick drying 360-degree reflective details increase your visibility in low light Two custom 500ml soft flasks help keep you hydrated on the trail Soft flask pockets with leash system for easy sipping and replacing Rear pass-through pocket quickly stows your trekking poles Front stretch pockets keep gels and balm within reach Hydration bladder compatible (reservoir sold separately)