The race face womens stash tank top is a great choice of mtb riders who are looking for extra storage without having to carry a pack it is lightweight and breathable so perfect for wearing under a loose fitting jersey there is a hydration pocket included which fits a 15l bladder with a channel to feed through your hydration hose and loops to secure eliminating the need to carry a bulky pack a stash pocket on the back is perfect for tools or gels keeping you out on the trails for longernb