Those shirts with the two stripes down the front that you often see in Florida are called guayabera shirts.
They are popular in warm parts of Latin America and among many Hispanic American men, especially in Florida.
They have pleated stripes down the front, four pockets, and side vents. No need to tuck them in; they are worn over trousers.
Some Latin Americans believe guayaberas are of Cuban or Caribbean origin, while others are certain it is of Mexican origin.