Black calf leather CASATI 25mm triple-strap sandals from NICHOLAS KIRKWOOD featuring faux pearl embellishment, branded insole, open toe, snap-button fastening and low block heel. POSITIVELY CONSCIOUS: The leather of this product is NATURE·L ® certified, meaning that it is highly biodegradable, requires less water in the tanning process and helps to reduce waste, so you can be confident you are choosing positively..