Martin O'Neill's side face Switzerland in their first warm-up match for this summer's tournament in France.
The manager is promising there will be a level of experimentation at the Aviva Stadium later and next Tuesday against Slovakia.
If he starts, John O'Shea will captain the team.
He says the 'atmosphere' in the Republic of Ireland camp means the switch from club to international football isn't a difficult one to make.
Kick-off is at 7.45.
