Members of the Green Party visited the Rossport Five at Clover Hill Prison today. The Mayo men are entering their fifth week in jail.
The men are demanding Shell change their plans for the Corrib gas pipeline.
Speaking outside the prison TD John Gormley said the men would remain there for as long as it takes.
"The message they want us to communicate is this that they are there on a point of principle. That it is about safety and they cannot leave this prison until the safety issues have been dealt with," said Deputy Gormley.