What is the Main material used on the Backpack?
We use a High Grade Polyester that is custom made from the factory. It is water resistant, and keeps the items inside cool.
Does the Backpack have substantial storage?
Yes, if you intend to use this backpack for school, it is able to fit many books and more.
Will the inside get wet if it is raining and/or water spills on it?
No, we use a Water Resistant Polyester material, which is able to prevent a substantial amount of liquid coming into the Backpack. 
Why does it take long to ship?
The amount of time it takes for your package to reach your door, depends on demand.