This 15 year old Glenfiddich malt is matured to perfection in three types of oak casks: sherry, traditional bourbon and new oak. The whisky is then brought together in the impressive Solera Vat, a large hand crafted wooden vat, which is always kept at least half full. This ensures a consistent finely balanced single malt. The process is completed by a settling period (marrying) in smaller Solera Tuns. Glenfiddich Solera Reserve is matured for a minimum of 15 years.