Fitted with a 3M Cool Flow™ Exhalation Valve, this respirator is ideally suited for work situations involving heat, humidity, or long periods of wear. 3M 8511 Particulate Respirator N95 has been a popular choice for protection against Avian flu, Bird flu, Tuberculosis / TB, and SARS. Our most popular valved disposable respirator, it is equipped with a Cool Flow™ valve, which helps reduce heat build-up inside the respirator, helping to enhance your comfort during longer jobs. Braided headbands two-strap design with dual point attachment helps provide a secure seal, 3M Cool Flow Exhalation Valve reduces heat build-up inside the respirator, Designed to increase comfort and wearability, This respirator contains no components made from natural rubber latex, Approximate weight of the product: 0.55 oz, Made in the USA with globally sourced materials, Use for solid particulates and liquid mists in concentrations not exceeding 10X PEL/OEL, Always follow UserInstructions and use in manners as indicated, DO NOT use for gases and vapors, oil aerosols, asbestos, arsenic, cadmium, lead, 4,4-methylene dianiline (MDA), or abrasive blasting, DO NOT use for particulate concentrations exceeding 10X PEL/OEL, DO NOT use in any manner not indicated in the User Instructions. Fit test kits can be purchased online. 3M 8511 Particulate Respirator N95 has been a popular choice for protection against Avian flu, Bird flu, Tuberculosis / TB, and SARS. Sold by the box of 10 masks. *Testing conducted in a 3M laboratory.