MasterCard is also pairing up with Ringly and Nymi (smart-ring and -band brands, respectively) on products that fully replace cash or plastic, but Selman is the only fashion designer currently involved. Beyond things you can actually wear that work as payment modes, MasterCard is also working with General Motors and TrackR, a bluetooth fob that ensures that your wallet, keys, an other essentials don't go MIA, on utilizing the payment technology. (Check out this video to see many of these payment-powered goods in action.)“This program eliminates the boundaries of how we pay by delivering a secure digital payment experience to virtually anything — rings, fitness and smart bands, car key fobs, apparel, and whatever comes along next," MasterCard's chief emerging payments officer, Ed McLaughlin, said in a statement.