How luxurious do these look Irresistibly touchable quilted leather softens the uppers of these ballet flats, while All Black adds leather linings and footbeds for more pliable goodness and moisture-wicking. The Diamond also features lines of elastic towards the back to snug you in, and a sliver of tractioned heel – and extra traction under toes – to keep you on your pretty feet. Absolutely ideal with leggings.