These tapes have been a blessing for me. I've always wanted to fix my mono-lid eyelids and change them to the double eyelids that I so desired. After using Opti-fold for only 3 months, I've seen substantial results! At first, my double eyelids only lasted 2 hours. But after a few weeks of consistent use, now one of my eyelids last the whole day. I think within just a few more months, both eyelids will last the full day. Just a reminder to everyone out there: it takes patience and dedication, but you'll definitely get the results with Opti-fold.