When it comes to hair extensions, one word that’s often thrown around is “Remy”. The term “Remy” is used broadly by different people, making it very confusing for those with no professional knowledge on the subject. There exists, however, one accurate definition of Remy hair. Remy is not really a name of a specific product, but instead is a description of how a certain type of hair extensions has been bundled and processed. Remy hair includes the root and the cuticles, and the strands are arranged such that all the roots are kept on one end of the bundle. This makes Remy extensions more durable than other types of extensions.e softer and smoother than most other types.