Hydration Backpack Aerolife With Lifetime Guarantee For Running Cycling and Hiking - Waterproof With 1.5 Liter TPU and Bladder - Special Fitness eBook Included ADJUSTIBLE FOR YOUR BODY - We created our AeroLife Running Backpack to be fully adjustable for every adventure; with shoulder and side straps to fit your body perfectly. EXTRA LIGHT - We know you dont want to feel the weight of the backpack on your body, which is why we created our bag to be as lighter as it can be and still make sure it will be comfortable with our strong fabric and special mesh materials. WATERPROOF - Now you dont have to think about the weather when you want to take the AeroLife backpack with you. We used unique waterproof materials on the backpack. BREATHABLE MESH BACK PANEL - Our AeroLife Running Backpack made from breathable materials so that you wont feel the difference when youre running with or without it. 1.5 Liter TPU - Free hydration bladder - To keep you hydrated all the way. It is very simple to refill and clean and is made of pure and flexible material. LIFETIME WARRANTY - You get 100%, no questions asked warranty + costumer service for a lifetime, so you dont need to think too much. Try AeroLife Backpack today.