I could not care less about copper shielding, but I Googled it anyway. Holy buckets. Don't do that unless you want to test your tolerance for the boring and mundane.
Also, here's a PSA: If you ever Google anything related to high-fidelity audio, the subsequent ads that will clutter your browser for the rest of your life will include things you will never buy and can only hope your audiophile will never buy.
Case in point, the fine folks at a company I will not name seem to think I just might be interested in a cable that costs more than my first house. Apparently my browsing history has led them to believe I am A) an audiophile, or B) completely unbalanced.
I guess the only way to run that A/B test is to order the cable and see if The Audiophile A) applauds me, or B) has me committed to a mental institution.