The term Blanc de Noirs means literally 'white of blacks' and denotes white wine made exclusively from black-skinned grapes. This is not unusual here in Champagne - black-skinned varieties (namely Pinot Noir and Pinot Meunier) are blended with Chardonnay in almost all Champagnes (with the exception of Blanc de Blancs). By pressing the grapes very lightly, the free-run juice remains clear and almost entirely untainted by the pigments in the grape skins. This gentle pressing also reduces the amount of tannin in the final wine.
Blanc de Noirs Champagnes tend to come from the region's more southerly vineyards, where the terroir is better suited to these varieties than further north.