Unique properties are, the fusion of the sweater backpack. The Gen 2 Swack Fusion pack has newer materials and uses the newest technology. There is only one in existence and only a hand full of people has seen it. My goal was to create something as futuristic as possible and the design turned out just like I envisioned it, simply amazing. I have the prototype and blueprints stored away, I think it would be perfect for the next big blockbuster sci-fi film. T.Simmons