Leinster backs coach Girvan Dempsey believes Garry Ringrose and Josh van der Flier have the maturity to cope with the international stage after they took part in Joe Schmidt's first Ireland training camp of the year.
Centre Ringrose (20) and flanker Van der Flier (22) have both impressed this season, with Ireland legend Brian O'Driscoll suggesting recently that Ringrose was a potential starter for the Six Nations opener against Wales on 7 February.
"Both Josh and Garry have been excellent," Dempsey told RTÉ Sport. "What's impressed me most about them is they're so mature for their age.
"How they go and prepare themselves for matches is incredible. The attention to detail, how they manage their bodies, on and off the field, and how they prepare in terms of knowing the calls, the system, talking with coaches and understanding what's required of them on the field..."
As to whether the Dublin-born pair are ready yet for the cut and thrust of the Six Nations, Dempsey was cautiously optimistic.
"They've had good experiences through the Pro12 and into Europe. Obviously, international rugby is a huge step."
"It will depend," he said. "They've had good experiences through the Pro12 and into Europe. Obviously, international rugby is a huge step.
"That will be up to Joe and the Irish management to see when he gets them into camp, and when they train with other guys whether they're capable and whether he feels they're ready for it.
"With any young kid you want to make sure they continue having good experiences. We've all seen in the past with players that everyone is talking up but all of a sudden a few bad experiences dent the confidence and it takes a while for it to get back up.
"But they're very mature for their age and they've handled the expectation to date."
Meanwhile, ahead of Friday night's visit to Ospreys, Dempsey confirmed that Jonathan Sexton had recovered from the dead leg that forced him off in the win over Connacht.
Scrum-half pair Luke McGrath (infected foot) and Isaac Boss (hamstring) may return at the weekend but tighthead prop Mike Ross (hamstring) isn't expected back in training until later in January.
Dempsey expects a tough test in Wales as Leinster turn their full focus to the Pro12 following Champions Cup elimination.
"Ospreys had a shaky start to the season but over the last five or six weeks they've really started to get into a vein of form and put together some good performances," he said.
"They've got international experience across the team and defensively they're very strong, they don't leak many scores.
"So it's going to be a challenge for us to break them down but we know that if we keep building as we have over the last few weeks, from Munster to Connacht and into this...
"This is our goal for the end of the season, we've only got the Pro12 so we're making sure that we're strong and we're prepared for that."