DO THE FR PROPERTIES WEAR OUT OF MY FR CLOTHING?
In short, the answer is no. FR/AR engineering is durable enough to withstand laundry and even industrial laundry. The industry offers a wide variety of different FR/AR fabrics, all with lifetime FR/AR properties. That’s why they guarantee the flame-resistant properties of all our FR/AR garments are good for the lifetime of that garment. The lifetime of the garment does vary, based largely on how each person wears it. It depends on the duties of your job and how rough your day-to-day work is on your clothing in general. But, because our FR/AR properties are good for the life of the garment, you can feel safe wearing your FR/AR clothing as long as the garment can be worn in a useful condition.
https://www.bulwark.com/do-the-fr-properties-wear-out-of-my-fr-clothing.html