Cape Town - Chris Robshaw has hailed the maturity England's newcomers have shown as the side gear up for the two-Test tour of Argentina.
England face Argentina on June 10 and June 17 in San Juan and Santa Fe respectively.
Robshaw captained England as they beat the Barbarians 28-14 at Twickenham in preparation for the tour.
He is among the more experienced campaigners in the squad chosen by Eddie Jones on Monday along with proper captain Dylan Hartley, Joe Launchbury, Mike Brown, Danny Care and George Ford.
Jones has mixed this experience with a healthy sprinkling of youth including twins Tom and Ben Curry as well as fellow teenagers Joe Cokanasiga and Nick Isiekwe.
Another newcomer, Saracens wing Nathan Earle, showcased his potential by scoring a brilliant try during England's 28-14 victory over the Barbarians at Twickenham on Sunday.
"I have been really impressed with everyone, whether they have been 18 or 32 or something like that," Robshaw told Sky Sports.
"It was a first hit-out for a lot of guys in an England shirt, and sometimes that can be a bit overwhelming, especially being at Twickenham in front of a good crowd against a star-studded team. But it was perfect preparation for us going to Argentina.
England's clash with the Barbarians was their first since having their Six Nations Grand Slam hopes ended by defeat to Ireland in March.
Robshaw added: "It is about trying to kick on from that Ireland game, because obviously that didn't go to plan.
"You never want to lose two games on the bounce, and that was an important message for us going into it (Barbarians match).