Great used condition. Size 39, which is an 8 per website. Plastic-Bottles-Made Uppers One pair of VIVAIA flats uses 6 recycled plastic bottles from city waste and the ocean. Our factories source these usable plastics, weave them into beautiful threads and knit them into super soft uppers. Keeping your shoes clean doesn't involve science anymore. Save some time to really enjoy life by throwing these shoes in the washer! Simply follow the washing guide and your VIVAIA shoes will be squeaky clean and ready to wear again and again.