Only worn 1-2 times - Elasticated sternum straps keep the vest secure and snug as you run Front drop-in pockets fit two 500ml hydration flasks Back storage fits a 1.5L hydration bladder Strap on top of shoulder keeps your hydration hose in place Zippered and drop-in pockets for running essentials Diagonal, zippered chest pockets for your small items Reflective details Hydration flasks, bladder, and hose not included Chest measurements: XS/S: 28''- 33''