These are dreadful! I bought them last April and wore them twice before having an ankle issue that required a boot, so I couldn't wear them for the rest of the summer. I had questions about their authenticity right off the bat, as the material just felt thin and cheap. How on earth can a strap this flimsy feeling, keep the sandal on my foot? The cork is terrible as well. After just the 2 wears last year, I took them out of the box to wear them again, and after wearing them 3 times, the cork is peeling and there are 2 spots where it's pulling away from the foot bad. Also, the one strap seems like it's longer no matter what hole I put it on. I seriously doubt these are real. I purchased a pair directly from Birkenstock, and the quality is night and day different. I would not recommend these to anyone. I would return them if I could.