XOP Macallan 35-year-old is a Scotch single malt whisky drawn from a single refill butt and bottled at 44.4% ABV. As an older single cask release, it is likely to show the individual character of one long-matured cask rather than a house-style batch profile.
For a novice drinker, "refill butt" suggests a large cask that has been used before, often allowing the distillery character and the effects of long ageing to come through with less overt cask influence than a first-fill cask. At 35 years old, this whisky is best approached slowly to appreciate its mature, layered style.