Seña is a single-estate, single-wine operation in the Aconcagua Valley, founded in 1995 by Robert Mondavi and Eduardo Chadwick of Errazuriz. It was one of Chile's first icon wines and is benchmarked against the greatest wines of Bordeaux and the top Super Tuscans, often winning top spots in blind tastings.

The wine is a blend of Cabernet Sauvignon (typically 55 to 60 percent) with Carmenere, Merlot, Cabernet Franc and Petit Verdot. Its hillside vineyard extends to 42 hectares (104 acres) on a range of soils and is slightly cooler than those on the Aconcagua valley floor, with harvest usually taking place a fortnight later. Ravines between the plots are used to create habitats for flora and fauna. Farming has been biodynamic since the mid 2000s.

Fruit is hand picked at delivered to the winery in small boxes where it is manually sorted. Grapes are mostly fermented in temperature-controlled stainless steel tanks, with a small percentage vinified in new French oak barrels. Maceration times vary between six and 33 days, depending on the variety and the development of individual lot. the wine undergoes malolactic fermentation and matures in new French oak barrels over 22 months.