The shoes are structured with carbon-fiber and covered in fine leather. I was surprised to learn that the styling isn't just for looks, but might actually work:

One late summer night in the studio I was thinking about the design of shoes in general. I wondered why there was the need for a foot plate in shoes such as high heels When I look at a foot print on sand it is very clear to see that the main force goes to the heel and ball. With a high heel providing the heel is supported, even by standing on a wooden block the foot naturally ’spans’ the gap naturally, with bones and tendons. The foot has its own inbuilt strength and support so why duplicate this. You would not have a jumper with rigid arms between elbow and wrist.