Dos Maderas Double Aged Rum 5+3 Years first resting for five years in the Caribbean, inside American oak casks. Later shipped to the facilities of the Williams & Humbert winery in Jerez (Andalucia - Spain) where it undergoes the final stage of aging, which lasts for three years, in casks that have previously been used to age the international award-winning sherry "Dos Cortados" with a guaranteed age of 20 years as certified by the Denomination of Origin Jerez-Xérès-Sherry.