Standard hibiscus-based blend – this means, of course, that hibiscus is the strongest flavor by far. I can pick up hints of currant and maybe a bit of blueberry as well, though. It’s quite dry, but not especially tart in my opinion (for a hibiscus tisane, anyway). I can’t taste the rooibos at all – not really sure why it’s here, actually. It’s pleasant, but it isn’t something I’d go out of my way to drink. Thanks for the sample, Nicole Martin!