Pét-nat (pétillant naturel) is a technique in which the winemaker caps the wine before fermentation ends to retain carbonation. This lightly fizzy, unfiltered Viognier shows soft flavours of yellow pear and quince, with a hint of sunflower seeds. Pét-nat (pétillant naturel) is a technique in which the winemaker caps the wine before fermentation ends to retain carbonation. This lightly fizzy, unfiltered Viognier shows soft flavours of yellow pear and quince, with a hint of sunflower seeds. 2400 LONG LAKE ROAD, SUDBURY, P3E5H5, (705) 522-8000