It can hardly get more pure than this--basically, this is Fortaleza Blanco direct from the still. Distillery tasting notes: "Aromas of fruit, baked fully-ripened agave, green olive, and earth are invitingly present. Slightly brighter and a touch more rustic than the regular blanco, the accents of butter, olive, earth, black pepper, and vegetal qualities in the flavor are enhanced because it comes straight from our small copper pot still, without adding water prior to bottling."