Monoparcelle 538 is the cadastral plot number for a 0.44 hectare plot of 47 year-old, massale selection Sauvignon Blanc planted on a shallow and gravelly soil 30 cm deep in the lieu-dit of Les Desmalets. Les Desmalets is potentially the fullest-bodied terroir Stéphane Riffault farms, so much so that he blends most of it into his village Sancerre and reserving its oldest vines for this profoundly expressive and age-worthy micro cuvée.