The Cabernet Sauvignon grapes come from the single vineyard of Tomahawk, which forms the coolest part of the Chimney Rock estate due to proximity to the San Pablo Bay. Cooling, fresh sea breezes ensure the intense fruit flavours are balanced by cooling nights, which impart natural freshness to the wines. The volcanic soils stress the cordon-trained vines to encourage deep root systems in search of nutrients. This distinctive combination of cool-climate location and volcanic soil produces intensely powerful, complex and opulent wines. The vines are meticulously cultivated. The estate holds the Napa Green Vineyard certification which provides a framework for growers to cultivate sustainably; through improving soil health, becoming carbon neutral, implementing efficient water-use strategies, incorporating integrated pest management techniques and soil cover crops. The grapes are hand-harvested at optimum maturity.