Claims to be the first and only IDA, which doesn't surprise me. Combination of a porter and a Welsh ale, I believe. Dark and frothy like a porter, and had a sweet caramel/toffee flavor, which I have said before, I am not crazy about. Good, I suppose, and I might actually try it again, to get used to. NA does brew a good product, and this beer is a novelty, so go for it. But if you can get it in singles, do that, because after six, the novelty might wear off.