For descriptions such as "Vendanges Tardives" (late harvest), "Vin de Glace" (ice wine) and "Vin de Paille" (straw wine) there are additional criteria to be observed in addition to the rules of the "Marque Nationale". The wines can only be made from grapes picked by hand from the appropriate vintages and containing a certain minimum level of natural sugar (must weight).
As for the "vin barrique" (barrel wine), mainly red in its origin, it is a white wine, mainly Chardonnay, which has aged for a couple of months in an oak barrel.
"Vendanges Tardives": the permitted varieties are Auxerrois, Pinot blanc, Pinot gris, Riesling and Gewürztraminer. The must weight should be 105° Oechsle* (95° for Riesling).
"Vin de Glace": can only be made from Pinot blanc, Pinot gris or Riesling, picked at a maximum natural outside temperature of -7°C. The must weight should be at least 120° Oe.
"Vin de Paille": is produced from the varieties Auxerrois, Pinot blanc, Pinot gris or Gewürztraminer. After fermentation the wine must show a minimum alcohol content of 18% (Vol.) for a must weight of 130° Oe.
* must weight is measured in degrees Oechsle (Oe)