This year many local vineyards have been hit by frost. Some have resorted to laboriously laying out and lighting dozens of frost candles in the vineyards every night when frost was predicted. Others have really gone to extreme lengths and hired helicopters to hover over the vines in the early morning.
I think the solution might be simpler, although it might need some experimentation to establish the most reliable method. The question is does the winemaker buy several sets and drape them around the vineyards at risk, or is just wearing them discreetly sufficient? Do other brands work or only this one?
In case you are wondering what I'm on about, Antigel is a line of underwear and swimwear by Lise Charmel. Antigel means 'anti-freeze'.