Sierra

Sierra was launched by Borco in the early 1980s and over time has become one of the best-selling tequila brands in Europe. Tequila is produced in Jalisco (Destilerías Sierra Unidas, Guadalajara) using mainly blue agave. The production process includes cooking the piñas in autoclaves, extracting the juice with presses/roller mills, fermentation with the producer's yeast strain, and double distillation, followed by either bottling or aging in oak barrels for the reposado/añejo expressions. Some lines (e.g. Antiguo / Milenario) are declared 100% agave, while the classic line includes mixto expressions. In recent years the brand has also communicated sustainability initiatives related to the sombrero topper.