Laphroaig Four Oak is a blend of single malts aged in four types of wood: ex-Bourbon barrels, 19th-century-style quarter casks, European oak hogsheads and virgin American oak.
Not a bottle I would buy again to be honest, it seems a little gimmicky. It’s also just a bit toothless and not what you expect from an Islay. Go for the 10 year Laphroaig or something like the Ardbeg 10.