On Hackaday, Shenzhen demonstrates some proof-of-concept "taser-proof clothing" created by adding carbon fiber to the clothes’ lining. The carbon fiber textile can be procured in a variety of forms, including upholstery fabric (58” wide, $19.50/yard).
Shenzhen claims this will work even if the taser’s prongs get to the
wearer’s body: “Electric current flows through the carbon tape and not
through the human body. Always. Even if the taser’s needle pierced the
skin.”