Yes, this blend is described as a caffeine-free hot drink. It is built around fermented Ivan tea (fireweed) and does not contain typical tea leaves from the Camellia sinensis plant, which are the usual source of caffeine in black or green tea. The other ingredients — chaga, tinder fungus and birch leaf — are also caffeine-free botanicals, so the infusion can be used as a warm drink at times when you prefer to avoid caffeine, such as in the evening or during a quiet work break.
Because it is a loose herbal blend, you can prepare it in the same way as most herbal teas: use about a teaspoon per cup, pour hot (not boiling) water over it, and steep for several minutes until the colour and strength suit your taste. You can adjust the amount of tea and steeping time depending on how strong you like it. It also works well in a thermos for outdoor walks, since the mushroom pieces continue to release flavour over a longer steep.
If you are sensitive to herbs or mushrooms, pregnant or breastfeeding, or choosing this for a child, it is sensible to check first whether this blend is suitable for you.