Hair extensions are pieces of hair that are added to a person's natural hair to make it look longer, fuller, or to create a different hairstyle. Full definition
So if you want to grow your own hair longer you can wear these human hair extensions in the mean while. (noragouma.com)
I've dreamed of hair extensions for so long! (paleomg.com)
Unless you are in another country where such things are considered trivial, as I was that summer feather hair extensions where all the rage. (fitbodyhq.com)