Sylvain Mosnier produces Chardonnay-based wines from Chablis, the northernmost region of Bourgogne. The winery's core range spans the appellation's three tiers: a foundational Chablis, a Premier Cru expression from Côte de Lechet, and Vieilles Vignes Chablis sourced from older vines. Chablis is defined by its cool continental climate and mineral-rich limestone soils, which impart the region's characteristic crisp acidity and flinty character to Chardonnay. Mosnier's wines have been assessed by Wine Enthusiast, Wine Advocate, Wine Spectator, and Decanter. The Vieilles Vignes Chablis and Premier Cru Côte de Lechet represent the upper range of the portfolio, while the base Chablis offers entry into the appellation's distinctive profile.