Kimlee Lightweight Outdoor Hiking Daypack Climbing Bag Waterproof Backpack Travel Bag for Men & Women High Quality MATERIAL:made of lightweight nylon fabric,make your travel light and convenient. 210D high tenacity nylon features durable, anti-tear, anti-dust, and water repellent,SBS zipper,YNS closure 3D Mesh pack panel to reduce the back contact and let hot air escape.Adjust strap Side panel hydration exit ports connect to the internal of main pocket Multipurpose: Hiking,cycling,climbing,running,,camping,outdoor travel,trekking