HIGH QUALITY MATERIAL:SKL hydration backPack lightweight,adjustable,comfortable,breathable mesh back panel and high-quality nylon fabric,it's your best choice for a full day sports and outdoor activity or nightly adventure.

ADJUSTABLE STRAPS:With adjustable shoulder straps,the backpack fit for men,women,and youth.Wide webbed shoulder straps help to reduce the burden of your shoulder which means you can wear this pack for hours.

Multi Functional Pockets and Reflective Strips:Enough pockets and pouches that can store items like cell phone, keys,thin raincoat,water bottle,hydration bladder and other items for outdoor activities.Reflective material which is quite luminous at any light ray at night ensures safe running or cycling at night.

2L HYDRATION BLADDER INCLUDED:The high quality hydration bladder is made of EVA material which is BPA-free,FDA-approved,pressure-tolerant,leak proof,tasteless,easy and simple to drink,just pull the rubber mouth piece out and the water comes right out.Push rubber mouth piece back to close,You don't have to bite anything.Drinking the water directly whenever you need without taking your running vest off or stopping your steps.Convenient trial running backpack outfit.

Satisfactory Customer Service:Any questions please feel free to contact us 7*24 hours,it's our goal to offer the BEST customer service on Amazon!