It certainly does what it's intended to do and a lot better than the old wool patch. I cringed each time I put a fly in the wool knowing full well that once home I would struggle to get that fly off the patch and back in it's box. The issue is it's weight. I is so much heavier than I expected. And as I get older, every ounce on my vest is an ounce I can do without. I'll certainly use this mag, but need to find out what I can leave behind...perhaps an equal amount of split shot. There, issue solved!