Yeah lace is not perfect. even the thinner laces can show up sometimes at the right lighting conditions and angles, but when I mean show up, I am talking about looking at it extremely close and knowing what to look for. I don't think most people are going to notice anything. There isn't much lace to see at the hairline. Most people cut the lace right up tot he hair, or they only leave a tiny bit excess.. So really the lace is pretty much invisible. I have seen laces that disappear in any lighting conditions etc, but they are extremely thin and delicate. So it is a trade off. I have worn SFS, 64 and thin skins exposed at the hairline without much of a problem.