Crafted in Italy, Nicholas Kirkwood's black suede Casati biker boots get a dark feminine edge with signature pearl embellishment on the heel in ominous black velvet, featuring a round toe, a pull tab at the rear, a front strap with a silver-tone detail, and a low block heel. Nicholas Kirkwood's stand-out designs have become the footwear of choice for the true fashionista, and these boots are no exception. Size: 40.5. Gender: Female. Material: Leather/Velvet.