From the site: In your line of work, you need every safety precaution you can possibly get. That's why the Wrangler® FR RIGGS WORKWEAR® five-pocket relaxed fit jean is designed to meet the rigorous standards of major protection agencies and workplaces. These relaxed fit jeans are designed to self-extinguish and effectively prevent or greatly reduce the severity of burn injuries on the job. They also come with the authentic five-pocket styling, a leg opening that fits over boots, and a bright orange outside ID for increased visibility. Wrangler's FR collection has everything you need to complete your outfit without compromising on comfort or safety