Remy hair extensions are the highest quality of human grade hair. The extensions are applied individually strand by strand. Each extension strand is pre bonded with keratin which is a protein naturally found in skin, hair and nails. The bonds are attached to tiny sections of the natural hair by melting the bonds at a low temperature with a heat connector and then the bond is rolled around the natural hair which then hardens and forms a secure bond. This method lasts 3-4 months and gives the bonds more stability against every day movement of your hair as with all the extensions.