The workers, who operate the Roslagsbanan line north of the capital Stockholm, have been wearing skirts to work for the past two weeks.
Employer Arriva banned the drivers from wearing shorts after taking over the running of the line in January.
But the company has given the men its blessing to wear skirts, according to local newspaper Mitti.
“Our thinking is that one should look decent and proper when representing Arriva and the present uniforms do that. If the man only wants [to wear] a skirt then that is OK,” Arriva communications manager Tomas Hedenius told the paper.
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According to the Swedish Newspaper Aftonbladet (in Swedish), will Arriva review the rules for staff clothing.