Why is Sav so popular?

It's known as one of the more polarising wines, but Sauvignon Blanc is actually a big deal for New Zealand's exporters. 

So, what's really in a good Sav?

Wine expert, Mary Kinsella, spoke to Duncan Garner.

Watch the video. 

Contact Newshub with your story tips:
news@newshub.co.nz