FR work shirts are quite popular among workers. The work shirt is a heavy-duty shirt used for manual or physical labor. Work shirts protect workers from different types of hazards. Wearing a work shirt protects your chest, shoulders, and arms from harsh weather conditions, chemicals, liquid splashes, dirt, grease, and fire. Typically, work shirts are fastened up the front with a button and have pockets and tool loops. Fire-resistant (FR) shirts are important for workers in a variety of industries including railroads, paint, pharmaceuticals, petrochemicals, construction, and electrical.