There are so many reasons to love tape-ins! Tape-in hair extensions are a great way to add length, volume, or both to your natural hair. Tape-in Hair Extensions have become very popular among hair stylists because of their easy installation and longevity. Tape-in extensions are made with double-sided tape, so the tape adheres to both your natural hair and the extension. This method is semi-permanent and can last up to eight weeks with proper care.