I not only use this "special" marker for some of my plant labels but also in some of the necks of my T's and sweatshirts that have had their labels removed. It might only be an "X", but I mark them so that I know front from back.
Those that were marked with the "Industrial" marker lasts many times over those marked with a "Permanent Sharpie".
I think I purchased those Industrial markers at our Wal Mart and until I found them this summer, I had neither seen nor heard of them before.
