So.Cap and Aqua Keratin Hair Extensions are perfectly fused when using keratin fusion gun and Italian keratin bonds. This strand-by-strand system applies with the use of melting the keratin bond with a fusion gun on to the client's hair. As with all of the extensions, keratin fusion hair extensions are using 100% Remy human hair. When your client knows exactly what they want, the temporary solutions will not do. Clip-ins, cylinder systems, and tape-ins are never going to top the appeal, look and natural look that comes with keratin fusion extensions.