From the Wahaka Website:
Crafting Wahaka Mezcal is a ritual that lasts an average of 25 days for a single 300-liter batch. After harvesting our 7-year-old Espadin, the agave hearts are then cooked for up to five days in an earthen pit using ocote (pine) wood. They are then crushed under a tahona (a traditional millstone) pulled by Pacquiau, our trusty mare. The agave is then fermented in wooden, open-air vats with distilled water and naturally occurring yeasts. Finally, it is distilled twice in a copper alembic where it is transformed into perfectly pure, artisanally crafted mezcal — from Maestro Beto’s hand to yours.