Valtellina is the largest terraced mountain wine-growing area in Italy. The native variety cultivated is Nebbiolo, locally called Chiavennasca. The vine is cultivated in an altitude range between 350 and 900 m above sea level. The Fay agricultural company was founded in 1973 by Sandro Fay who, starting from the small family wine production, decided to develop this activity; since 1998 he has been supported by his sons Marco and Elena. Sandro Fay's vineyards cover a total area of about 15 hectares; by family tradition the company is strongly linked to the Valgella sub-area, where almost all the production is concentrated. Valgella is the name of one of the five sub-zones of the Valtellina Superiore Docg denomination; it extends over 137 hectares in the municipality of Teglio. The name derives from "Valgel", a dialectal form to indicate the small streams that characterize the area. The soils are mainly sandy (about 70%), loamy (about 18%), with no clay or limestone, with an acid pH between 4.5 and 5.5. They derive from crumbled granite formations and vary in thickness from less than 1 metre to a few metres. Sandro Fay's commitment is aimed at enhancing the value of the individual vineyards, which, according to the soil and altitude peculiarities, give rise to different wines with a strong personality. The altimetric altitude at which a vineyard is located is a fundamental variable to understand the potential of a wine. Within the Valgella area, where almost all the vineyards of the Sandro Fay winery are located, three very precise altimetric ranges have been distinguished. The "Costa bassa" is part of the valley floor and reaches up to 450 m above sea level; the climatic conditions make the skin thinner and the grapes have a medium-low acidity and soft tannin. From this area comes the base wine, the simple and sincere expression of Chiavennasca. The intermediate zone is located between 450 m. a.s.l. and 600 m. a.s.l.; here are the optimal climatic conditions to produce more structured and complex wines. In this area, the differences between the individual vineyards are the expression of an uneven territory that deserves to be enhanced. Above 600 m. a.s.l. there is the Sforzato vineyard; conditions