foiled foiled twisted pair (F/FTP)
The F/FTP cable, Foiled Foiled Twisted Pair (F/FTP or FFTP) offers the best possible shielding of all FTP cables.
In the F/FTP cable, each individual twisted pair is surrounded by an aluminum foil.
In addition, the entire conductor strand is encased in an aluminum foil. F/FTP cables have better interference radiation properties than S/FTP cables, but are stiffer due to the additional core shielding and can therefore be laid more poorly. As with the other TP cables, the outer jacket is made of polyvinyl chloride( PVC).