Sherry seasoned oak casts define The Glenrothes single malt Scotch Whisky. Almost 9% of casks maturing at our Speyside distillery have previously held sherry, a wine made from white grapes grown near the city of Jerez de la Frontera in Andalusia Spain. The Soleo Collection pays homage to the origin of whisky making by celebrating the flavorsome stages of the grape's evolution. Soleo is the traditional sun-drying process which creates the foundation for crafting the finest sherry. The grapes are placed under the heat of the Andalusian sun, as they absorb the energy, they change from bright green and yellow to deep purple - signalling the perfect moment for fermentation. Matured entirely in sherry-seasoned oak casks and 1% natural color, this Collection introduces a multi-dimensional flavor experience, uniquely shaped by the casks in which the spirit has been nurtured and matured.