From The Official Website

Nàdurra, meaning ‘natural’ in Gaelic, is The Glenlivet’s range of small-batch expressions made using traditional 19th-century techniques. The Nàdurra First Fill is drawn from casks made of American white oak which have never before been used to mature Scotch whisky. These oak casks, which distillers at The Glenlivet have favoured since the early 1900s, impart hints of creamy vanilla to this wonderfully rich single malt. You’ll really taste the effects of that white oak, beautifully complemented by sweet pear, tropical pineapple, ripe banana and citric sparkle. This is a cask-strength single malt that represents the skill of our team and the tradition of The Glenlivet. And unlike most modern whiskies, this one is non-chill filtered, so it’s very richly textured. It’s an expression that will appeal to the intrepid whisky lover.