Yes, you must comb it in.It locks in the DermMatch.It does a great job of blending the real hair into the
other humans hair.If you have a slight off color,its gone.The key word is slight.If your hair is thin,this will help out
big time.If you have that red/orange glow,its gone.You could also add some sunscreen into this trick also.
We all wear hair and we all need tricks to help us look good and save money,bottom line.