Raul,
Audio Note's website shows it as being polyurethane insulation. See part number AN-WIRE-300 three quarters of the way down the page.
http://www.audionote.co.uk/comp/cables.shtml
Audio Note's website shows it as being polyurethane insulation. See part number AN-WIRE-300 three quarters of the way down the page.
http://www.audionote.co.uk/comp/cables.shtml