Winger Andrew Trimble admits Ireland are bracing themselves for a “severe physical test” against reigning RBS 6 Nations champions Wales on Saturday.
Trimble scored against Scotland last week in his first Irish start since last summer, and has retained his place for the visit of Wales.
The Ulster flyer knows full well Wales’ monster backline almost dwarfs the Ireland contingent, admitting Joe Schmidt’s men have steeled themselves for a battle at the Aviva Stadium.
“The likes of Cuthbert and North are the boys being talked about,” said Trimble.
“But Jamie Roberts, Scott Williams: apart from Halfpenny all of them are massive.
“They are largely, because of their size, used to get over the gainline, to generate quick ball.
“They are good athletes but they are good with the ball in hand as well.
“So I think there’s a lot of strength there.
“The likes of North are producing offloads and neat passes, and these guys can play a bit as well.
“So they are certainly not just there because they get over the gainline.
“We’ve got to be organised in defence, it’s about backing each other up, work-rate, getting our shape right in the back-field, to make sure we close them off in the corners, and then just really go at them.
“If you go in half-cooked against Cuthbert or North you’re going to get bounced.
“And that’s similar enough to last week in a lot of respects, with the Scottish wings.
“They always play direct, and I think they get quite a good balance as well to be honest.”