When the job takes you into freezing temperatures, biting winds and high-risk environments, you need gear that delivers both serious warmth and dependable flame-resistant protection. Big Bill flame-resistant insulated coveralls and overalls are built for thermal hazards such as flash fire and electric arc exposure, while giving you the durability and comfort needed for long days in harsh conditions. With a range of insulation levels, rugged fabrics and functional designs, these garments make tough work a little easier. Our collection includes heavy duty insulated coveralls for extreme cold, insulated bib overalls with full mobility and weather protection and hi-vis insulated styles designed for visibility in low light. Many styles feature storm protection, reinforced stress points and thigh-high leg zippers for easy on and off over work boots. Whether you are working outdoors, climbing equipment or handling long winter shifts, these insulated flame-resistant garments help keep you warm, dry and focused. Every Big Bill insulated coverall and overall is arc-rated and fully compliant with ASTM 1506, CSA Z462 and NFPA 70E. Tested to high standards and engineered for long lasting performance, they offer reliable flame-resistant protection and dependable comfort for the life of the product.