The Irishman Single Malt Irish Whiskey is—as the label suggests—composed of 100% malt whiskey (that is, barley) and then aged for at least 10 years in a combination of bourbon and sherry casks. The whiskey is actually distilled in Bushmills but then key barrels are selected for aging by the distillers at the Walsh family of Hot Irishman.
Hot Irishman is a company formed by Bernard and Rosemary Walsh. The Walsh family claims an origin in Ireland stretching back to in 1174 with reference to Philip Branagh (the name anglicized later to Walsh) who was mentioned in a naval battle. Hot Irishman was founded in 1999 and dedicated to "developing brands with heritage."