Felsner operates in Kremstal, a subregion of Niederösterreich in Austria's Weinland, where the Danube valley's cool climate and terraced vineyards shape distinctive wines. The winery works primarily with Austrian varieties: Zweigelt, Grüner Veltliner, and Sankt Laurent. Its Hesperia Zweigelt Eiswein—a dessert wine made from the dark-skinned Zweigelt grape—has earned recognition from Falstaff, Wine Spectator, Wine Enthusiast, and Decanter. The Reserve Alte Reben, a Grüner Veltliner from older vines, reflects the region's reputation for mineral-driven white wines with acidity and complexity. The Rohrendorfer Thalland Sankt Laurent, sourced from a specific vineyard site, showcases the spicy, structured character of this indigenous red variety. Together, these wines demonstrate Felsner's commitment to the classic grape palette of the Danube region.