Frankie Boateng H.P.01 Concept The Hydro Protected line started when we were testing materials besides leather that would be fully waterproof. We learned then that there are different kinds of materials, such as nylon, that we can use to keep your belongings dry. The Bullet Bag is based on a weapon bag that carries the weapon and bullets in the small pockets. The Jacket is inspired by the Bullet Bag. When you look at these products, you get a sense of combat: ready to wear, rain protected.