Istine produces Sangiovese-based wines from Chianti Classico, the historic heart of Tuscany. The winery's core offerings—Casanova dell'Aia, Vigna Casanova, and Levigne Riserva—demonstrate the region's signature expression of Sangiovese: wines marked by structure, acidity, and the ability to age. Each has been assessed by major critics including Decanter, Wine Spectator, Wine Advocate, and Wine Enthusiast. Chianti Classico itself is defined by strict production rules and a terroir shaped by limestone-rich soils and a continental climate tempered by Mediterranean influence. Sangiovese, the mandatory grape, brings earthy notes and firm tannins that pair naturally with the region's food traditions. Istine's portfolio reflects this classical foundation.