Mumm Cuvee Napa Brut
From Mumm: Thank you for your email! Winemaking techniques can change slightly from year to year, as well as considering which products are within the current vintage release. We use a variety of protein and clay fining agents in our winemaking; however, the wine is filtered with a 0.45Âµm filtration system, which would remove any influence of those products. To be safe, we would still say they are not vegan.