I am very disappointed with the QC this happened during the second time I wore them, and they keep coming off. Sure I can put it back but before you know it just happened again and again and again... I can still wear them but they just bother me from time to time. Shoes should make you forget they are there! I don't think it's about the way I walk because I test the other clog by deliberately pulling its strap and it is solid. I bought them in U.S. and had them shipped to China so I don't think it's possible for me to return or replace it. I bought this because I heard it lasts. Wish more luck for other fellows. After all they are comfortable.