This cycling hydration backpack is made of water resistant and ripstop nylon, including a 2L food grade bladder. The padded shoulder straps, adjustable hip belt, breathable system and lightweight design make it perfect for outdoor sports. Reflective trim keeps you visible in the dark. It is great for hiking, jogging, cycling, walking, traveling, climbing, running & more. Add a custom logo on this great promotional product for brand exposure. Complies with Prop 65, FDA.