However, the shirts on display in Walmart that I saw were not entirely au fait with Ireland's national symbol - the shamrock, the three-leaf shamrock. A four-leaf clover might make for a nice shirt - I guess - but it is not a symbol of Ireland or the Irish. So Walmart and Fruit of the Loom have it wrong here.
No idea what's going on with that skull and swords image, but the little clovers all have four leaves. Tut-tut.
There was one shirt that had it right. Just one and it wasn't a Fruit of the Loom shirt. It's nothing special, but at least the shamrock has the maximum three leaves.