Again from this lineout they have a massive quick line speed to shut Wales down. They make a great choke tackle forcing the ball to be slow.
Then from the pick and go, Ireland pile into the breakdown, putting bodies in the way and Aki rips the off the ball carrier in the tackle.
This is extremely disruptive for an attack to lose the ball in just the second phase.
Again, in the clip below you will se that they push up on every flight of the ball. They push up quickly, make big shots, choke tackle and Bundee Aki forces Justin Tupric to clear him out.
They just hassle and hurry the defence consistently.
They get up high in the line, block passing lanes and force the errors.
In the final clip, you can see how Ireland again make massive hits and keep up the intensity. I think they do go offside sometimes, but they come up high and heavy.
Another big shot choke tackle by Sexton and Bundee.
And then on the next phase, they are up super quick in your face again, forcing the miracle passes and again another big shot on Tipuric.
From there the Irish are competing like crazy on the floor and Stander early gets over the ball and slows ball right down, almost getting the turnover.
So I think the Irish defence is a huge factor. They've got multiple weapons. They've got the big hits where they dislodge the ball, they got the choke tackles and they compete on the floor. So they've got three or four weapons in the defensive tackling arsenal.