Dow's is entirely owned and managed by the Symington family, Port producers since the 19th century. Today, the company remains 100% family owned with 5 family members actively working in the company. The Douro valley enjoys a unique status as the world's oldest demarcated wine region and UNESCO world heritage site. This wine is released both in declared and non-declared Vintage years and is aged for up to six years in cask prior to release. Dow’s ensure that only the best quality fruit goes into making this wine, the quality is consistently excellent in any year that it’s produced.