Easy to use and adjust the race elite vest utilises an all mesh construction making this hydration pack both lightweight and breathable an ideal pack for any type of runner with stretch pockets and no zips for cold and numb fingers to deal with access to all your kit is quick and simple two 500ml bottles can be stowed to the side making hydration as you run quick and easy easy to use constructed entirely of mesh and featuring only stretch pockets means there are no zips and access is super