They are all synthetic, and striking concoctions. You'll be amazed at the flavorants they use, and how stunningly they evoke "Dirt" or "rain" or "Early grey tea". It really makes me marvel at what chemistry can do. The downside is that they have no staying power whatsoever. The smell is gone as soon as the spritz dissipates in the air. this is why they are marketed as "pick me up"s rather than proper EdTs.