According to the card, this is a blend of wild granulated ivan tea and rooibos tea: narrow-leaved fireweed leaf 70% and rooibos 30%. The manufacturer describes the taste as unusual, tart, with a note of African tea; the product contains no caffeine. The card does not explain the comparison with ordinary ivan tea or why rooibos is here.
General information (not a manufacturer's instruction): rooibos is a tea-like drink made from the leaves of a shrub, not real tea.