Carhartt Men's Flame Resistant Rugged Flex Jean Straight Traditional Fit 99% Cotton, 1% Spandex Imported button closure Machine Wash Rugged flex durable stretch technology for ease of movement Straight traditional fit sits slightly below the waist Slim seat and thigh Garment washed for a soft finish Meets the performance requirements of NFPA 70E and is ul classified to NFPA 2112