Birkenstock Birki's Maria Taupe Mary Jane Clog Slip On Shoes Size 37

Super cute Birkenstock Birki's Maria mary jane slip ons. Taupe greyish brown color. Size 37. US size 6.5/7. These are in good lightly used condition. I'm not completely sure if these are 100% leather. They look like leather. The leather is backed by a soft most likely synthetic material. Questions? please ask. All sales final. I do not accept returns. Thanks for looking.