no, it is not as thin as 3 mil. it is the standard 7 mil thickness.
it can be worn on the front with proper application. you can see a front hairline on my website at <!-- m --><a class="postlink" href="http://www.splitendshairreplacement.com">http://www.splitendshairreplacement.com</a><!-- m --> under photo gallery.
DebbieS.