<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script> <script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script> <!------ Include the above in your HEAD tag ----------> Matrix PDO Threads are another method of tightening and thickening your skin. They are a type of single PDO filament, are smooth and without barbs Matrix <a href="https://www.envogueskin.com.au/matrix-pdo-mono-threads/">PDOThreads</a> are inserted into the sub dermal level, in a mesh-like pattern, to promote the creation of new collagen. The threads activate collagen synthesis which produces a gradual skin thickening, skin tightening and rejuvenation effect.