What is "guayaberas"

Usage examples of "guayaberas".

Then back on the plane for nearly eight more hours to Guam, an hour at the airport bumping shoulders with soldiers and sailors and minor government officials in guayaberas, and a forty-minute shuttle to Saipan.

Once Castro gave a subtle tug on his good earlobe, three stocky men in guayaberas materialized to escort the voluble cleaners off the premises.

All I can say is that they all wore guayaberas and ordered lobster on pieces of paper that had to be unfolded to be read.