This is a process also known as hackling which achieves realistic color graduations in a hairpiece, extension or wig by mixing multiple fiber colors.
Daily Hair Tip
A perfect hair knot is one of the simplest ideas to jazz up the back of any hair. The most important part of having a hair knot is that it look immaculate and be pinned securely. If your hair is too short to form a hair knot you can clip on a fake ponytail and twist it into the knot of your choice.