This expression is a shining example of The Macallan's tenacious attention to detail. The luxury spirit undergoes a meticulous aging process and contains only the finest ingredients - Momentum, a unique strain of barley exclusive to The Macallan; mineral-rich water drawn from beneath The Macallan Estate; and a specially formulated cultured yeast. This insistence on quality ensures The Macallan Sherry Oak 25 Years Old contains rich and complex flavors, ensuring that every sip achieves the highest standards of being the world's most precious whisky.