Hair extensions have long been the closely held secret of an exalted few and their glam squads, offering the supernatural versatility to go from shoulder-length hair in the morning to waist-length waves at night. Or, taking tresses from platinum to blue to brown in mere days sans damage. And while many of us mere mortals have taken to donning extensions, too, the truth is, they can be pretty intimidating to navigate. There are countless styles, types, and installation methods, and the list of terms used to describe the types of hair is never-ending (and not always self-explanatory).
