The favorable natural factors are enhanced by the pruning of the grapes (which guarantees a high quality product even in less favorable years), the selection of grapes during the harvest, the careful winemaking at controlled temperatures and the selection during the maturing process. In fact, only a part of the production (aged for four years in Slavonian oak barrels) is destined to become Brunello DOCG, while the other part becomes Rosso di Montalcino DOC (after a maturing process of two years) or Rosso da Tavola (a red table wine). During the best vintage years the best Brunello barrels are destined for Riserva and bottled after five years. When bottled, the wine is also refined for a few months.