Birkenstock Womens Cosma Sandal Black/Silver Narrow Size 38 EU (7-7.5 N US Women) fabric Contoured cork footbed has great support and molds to your own feet over time. Soft moisture absorbent suede liner. Deep heel cup keeps your heel supported for good body alignment. Flexible EVA soles provide lightweight cushion and can be replaced when worn. Wipe clean with a damp cloth. Try soap and water or a mild leather cleaner to remove stubborn stains.