Made with durable fly-like fishing line (non conductive and available in 5 different colors). EXTREMELY LIGHTWEIGHT! Cablz Flyz come in a long 22” length that can be shortened by simply pushing the fly-like line thru the rubber end, cutting the excess fly-like line and tying a knot at your desired length. Tip: Use an alcohol-based hand sanitizer to apply Cablz to your eyewear for easy application and secure fit.