A non-vintage Champagne (or NV) is a blend of wines from several harvest years. This practice, unique to Champagne, allows producers to maintain a consistent and recognisable style from one year to the next, regardless of climatic variations. A vintage Champagne, on the other hand, is produced only in years deemed sufficiently remarkable to express the character of a single, unique vintage. It is generally more complex, rarer, and requires longer ageing in the cellar before release. These two categories reflect different tasting philosophies — one valuing consistency, the other the expression of a terroir at a precise moment in time.