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Unlike night-vision scopes, it does not turn off during the day. Wearing the cowl will give you a night-vision effect. It additionally has a Damage Threshold of 11 and the cowl has one of 2. The hazmat suit gives an astonishing +85% to poison resistance, yet its bulky size of 18 pounds makes it a questionable addition to the players equipment if not used regularly. Despite its quality and its high protection against poison, the hazmat suit did not protect against the poisonous gas cloud of the Sierra Madre villa which later became the Cloud. The cowl is also known to create difficulty when speaking, making construction workers communicate through nonverbal means. The eyepieces are bright yellow in the center and glowing green around. The hazmat darklight cowl has an integrated night-vision setting which makes the vision of the wearer lighter and green-colored. It is not protected from corrosion when exposed to the Cloud, the hazmat suit had to be opened with an extremely sharp blade like the cosmic knife. The hazmat suit is known to be bulky and would grow stiff with use. The ghost people resulted, an atypical mutation and terrifying perversion of humanity. Due to unforeseen interaction between the two experiments, the Sierra Madre villa workers slowly mutated soon after the Great War. Described as an "experiment within an experiment", the new hazmat suits were issued to the Sierra Madre villa workers when the Cloud, a toxin also originating from Big MT, became a major impediment for the construction crews and to general health.
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The experimental hazardous material suit and hazmat darklight cowl were created at Big MT before the Great War.
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