Mulline operates in Geelong, Victoria's coolest wine region, where maritime influence shapes wines of precision and restraint. The winery's portfolio centers on Shiraz and Chardonnay—varieties that thrive in Port Phillip's temperate conditions. Sutherlands Creek Shiraz - Viognier, the flagship red, pairs Shiraz with Viognier in a structure that reflects the region's ability to ripen dark fruit while preserving acidity and complexity. Bannockburn Syrah follows, a pure expression of the varietal in a cool climate. On the white side, Portarlington Chardonnay demonstrates the region's capacity for mineral-driven, age-worthy Chardonnay. Wine Advocate and Wine Enthusiast have assessed the range, with the top wines scoring in the low-to-mid 90s. Geelong's cool maritime climate—shaped by proximity to Port Phillip Bay—produces wines marked by tension between ripeness and freshness, a signature of the region's finest producers.