Protective overalls protect against chemical splash, high heat and sparks. Overalls are worn under protective coats and jackets to shield the legs and provide secondary torso protection. They include welding- and heat-resistant overalls, rain overalls and chemical-resistant overalls. Welding- and heat-resistant overalls shield workers from the high heat and sparks generated by welding. Rain overalls keep workers dry in rainy or wet conditions. Chemical-resistant overalls protect workers from a large variety of chemicals such as alkalis, ketones and acids.