John, The lip on this one is simply clear Polycarbonate. I bought a 12" x 24" sheet of 1/32" think polycarbonate from Amazon for $9.99. It's cheap, easy to work with (I cut it with heavy-duty scissors) and for $10 I have enough for 2 or 3 lifetimes. On some of my other patterns, I use Fly Lips which you can find at many online fly shops. I find that adding lips gives them much more action and often is the difference between a strike or a pass.