Rey Campero Espadin Mezcal uses agave Espadin that is fermented in open-air with wild yeasts. Many batches of Rey Campero Espadin are also aged in glass before bottling, which gives them a much softer feel. Make sure to check the release and bottling information on each bottle as different batches have different flavor notes.  Regardless of which release you’re tasting, many consider this to be one of the better Espadin Mezcals on the market.