Bill, the Caveman, has a very interesting take on the Vin Nature movement:
"The ‘vin nature’ movement extols as it’s primary virtue that a wine must reflect as honestly as possible the millisème that it was made, the terroir where it was grown and ultimately, the skill and soul of the winemaker. Entirely organic in the vineyard, it's proponents attempt to maintain the ‘signature’ of ‘the place’ throughout all stages of vinification. In practice this means the addition of little or no sulfites, allowing the indigineous yeasts that already exist in the soil to work their magic, and no filtering or fining. They buck the trend towards using international varietals, embracing instead the traditional grapes of their region."