Emerson Fry White Mules Sz. 38 7.5 EUC Made in Italy

Hi, These are Emerson Fry mules in Sz EU 38. Fit like US 7-7.5. Effortless and chic for summer. Not sure what the top white material is. Hard to capture the texture. Shows minor signs of wear. Worn only a few times since purchase. Thanks!