My wallet is perhaps a little behind the times. My debit cards do not have touch-to-pay, I have a credit card with that feature, but it got rejected a couple of times and I honestly didn't investigate why, I simply lost faith in using that method to pay. Enter - Barclays bPay band.
I mentioned in the first part on design that I had guessed that the metal in metal coat hangers might be just flexible enough to form to a shape I want, and just stiff enough to provide some springy tension. It was this that formed the basis for my headband design.