If using synthetic hair, take a section and use as many kirby grips as necessary to attach it to your own hair. Once one section is secure, continue to unravel the synthetic hair around the ponytail and secure it to your hair - be sure that the attachment is nice and tight. Ask a friend to help and check that the hair is symmetrical. Then take two inches of synthetic hair and wrap it around the join so it looks seamless, and pin this in place.