The best type of human hair extensions will vary depending on the individual‘s desired look and budget. However, some of the most popular types of human hair extensions include pre–bonded, tape–in, clip–in/clip–on, and keratin–based. Pre–bonded hair extensions are generally more expensive than other types of human hair extensions, but can last for up to 12 weeks and look very natural. Tape–in hair extensions are less expensive than pre–bonded and can last for up to 8 weeks. Clip–in/clip–on hair extensions are the least expensive and can be taken on and off quickly. Keratin–based hair extensions are made from real human hair and can last for up to 8 weeks.