2. They Are Invisible
This part should be obvious, because it’s right there in the name. Invisalign products are clear, and you can hardly tell that people are wearing them. The main giveaway is that while wearing them the person may have a slight lisp, but other than that they are virtually invisible to the naked eye.
Many people still associate traditional wire braces as an embarrassing phase of middle school or high school, so a less obvious option is quite attractive to adults — and even adolescents.