Borderies (4,160 hectares ( 10,300 acres) ) The smallest cru, eaux de vie from the Borderies are the most distinctive, with nutty aromas and flavour,as well as a distinct violet or iris characteristic. Cognacs made with a high percentage of these eaux de vie, for example, “Cordon Bleu” by Martell, are dominated by these very sought-after flavours.