3 Fonteinen's Zenne y Frontera is a unique creative collaboration by Armand Debelder and maître-sommelier Andy De Brouwer. This natural millésime beer is a blend of young traditional lambics that have aged on authentic Oloroso, Amontillado, and/or Pedro Ximénez sherry casks that are forty years or older. Zenne y Frontera is the perfect symbiosis of a few stubborn characters, a lot of wild ideas, a vast palette of aromas and two beautiful regions!