Those are commonly called Japanese-style coals. They are sold under many different brands and labels, but they're pretty much all the exact same thing..
They're naturals, they light up rather easily and perform well. My only gripe with them is that they don't last long enough, but that's a common complain. Apparently, Eric Tangiers thinks highly of these coals.
Here's an example of Japanese/silver coals
Edit: after a quick Google search, I found out that Torch coals are a Chinese imitation of Japanese coals. This could mean that they're not as good as the "originals", however if you're satisfied with them, I see no reason to stop using them.