The Hellfire Structural/Haz-Mat Firefighting Boot from Thorogood is certified to both NFPA 1971 (structural firefighting) and NFPA 1992 (splash-protective for hazmat). The comfortable, lightweight boot protects against high heat and high-tech A and B-rated chemicals, incorporating flame-suppressing materials. High temperature-resistant reflective patches on the exterior of the boot reduce heat transference.Thorogood, Weinbrenner Shoe Co., Merrill, WI.