French oak is much tighter grained and less dense than American oak, thus imparting more subtle flavors and firmer, but silkier tannins. It also can impart roasted subtitles and hints of spice to the finished wine. French oak barrels are also known to provide a certain elegance and creamy quality in the wine, largely due to the silky tannins. Grape varietals such Chardonnay tend to benefit most from aging in French oak.