105079 Carhartt Men's FR Rugged Flex Jean Relaxed Fit Safety doesn't have to come at the cost of comfort. These men's jeans hold up to NFPA 2112 and MFPA 70E standards while keeping you comfortable long beyond clock-out. They're made of FR denim with enough flex to bend, stretch, and move. The straight-leg jeans are cut for a relaxed fit, with extra room to move in the seat and thigh.