Fermentation of G4 De Madera Blanco Tequila occurs exclusively in wooden fermenters, giving it its namesake "Madera". This is the first tequila from El Pandillo to undergo 100% wood fermentation, a development that has Felipe Camarena feeling very enthusiastic. G4 (four generations), created by Felipe Camarena, is distilled at El Pandillo Distillery in Jesús María, Jalisco (Nom #1579). The agaves are cooked in one of two stone ovens on site for 22 hours and crushed in a handmade metal tahona known as "Felipestein" (nicknamed after Frankenstein). It is then double distilled in copper stills.