HYDRATION BOTTLES Equipped with 2 x 250ml water bottles the hhquality water bottle is made of foodgrade PP5 material which is BPAfree. The running bottle has excellent pressure resistance and leakproof functionality ensuring an ample water supply during various outdoor activities LNTWEHT DURABAL MATERIAL Made from ultralht nylon spandex and polyester fibers with breathable mesh on the back and shoulder straps it is extremely lhtweht fortable and breathable. Even when worn for long periods there is no pressure allowing you to fully enjoy outdoor activities REFLECTIVE STRIP DESN Hhquality reflective strips are used in multiple locations on the front and back to ensure safety in any lhting conditions during nhttime activities. The adjustable desn is suitable for individuals with a chest circumference of cm/30..31 inches NO SHIFTING This running vest backpack is desned according to ergonomics featuring an adjustable waist strap and hhly elastic chest strap. It can acmodate most body types while maintaining hh stability. This reflective hydration vest is suitable for running traveling camping fishing hunting and wearing at concerts exhibitions or any situation where you want to ensure the safety of your belongings MULTIPLE STORAGE PARTMENTS There is 1 main pocket 2 open pockets and 1 zippered pocket to conveniently store your essentials such as cell phone keys lhtweht raincoat spare clothes 250ml 8.45oz water bottle and other outdoor activity items