These durable respirators are produced from state-of-the-art filtration media, and are electrostatically charged to enhance filtration and provide low breathing resistance making the wearer comfortable for extended periods. Designed with a double-shell construction makes these respirators collapse resistant and able to withstand hot and humid conditions thereby extending its life and making these a greater value. The built-in low pressure drop (LPD) exhalation valve aids the wearer with easier breathing making these a great choice for comfort use. Sold in boxes of 10 each.