High quality exhalation valve – reduces heat and humidity inside the mask. Inner foam face seal for better face fit and comfort. Metal nose clip. High protection against harmful and toxic substances such as fine dust, smoke and aerosols. Manufactured using high performance filter media. Adjustable head-straps – suitable for different head sizes. Low breathing resistance. An excellent mask for companies that adhere to face fit testing. Easy and safe to use. Excellent price. Each mask comes individually packaged