Think of col fondo like a cross between prosecco, Champagne and pet nat. It's fermented in bottle, like a traditional sparkling wine. But it's not disgorge like champagne is so you get a cloudy wine often with some sediment.
This isn't as fizzy or sweet as you get with prosecco and instead, you get a really elegant and fresh sparkling wine. It's made from glera, which is the renamed grape that features in prosecco.
If you love prosecco and love natural wine, and want to see what a fresher, natural prosecco will look like – then look no further.