Szigeti produces wine from contracted growers in Burgenland and Niederösterreich and works closely with their partners to obtain grapes explicitly grown to produce quality sparkling wine. The designation "Österreichischer Sekt g.U." (Austrian Sekt with Protected Designation of Origin) applies to the entire production.

Riesling Spitzer Graben Brut is from Szigeti’s “Terroir Exclusiv” line, a series of Sekt sourced from specific terroirs in various regions in Austria. Spitzer Graben is a cool valley in the westernmost part of the Wachau where some of Austria’s finest Rieslings grow on steep stone terraces overlooking the valley.