These are Custom Made Leather Patches for Baseball Style Hats of the Passport System that FDNY wears on the front of there Leather Shields on their Firefighting Helmets. So when your Off Duty and just cruising the City another member sees it he will know what exactly it is. That's because only people in the Fire Service is known to it, So its another way of showing the pride of the House you belong to and Proudly work for.All Hats are Richardson Style Hats. Many different hats to choose from and sizes. Order yours today to start a New trend in Off Duty wear from Black Lab Leather Co. .