Nike and Union keep collaborations coming as they release another collaborative shoe. This time the Dunk Low Union Passport Pack Argon. The Pair features two shades of blue on the upper just like the inspiration - 2001 Nike Dunk Low CO.JP Argon - The whole upper is made from semi-translucent ripstop nylon covering. And to top it off, a Union LA Frontman logo on the heel and "UN/LA" quarter panel tabs add the finishing touch.