Carbon Filter Masks N95 with Exhalation Valve N95 Carbon Valved Particulate Respirators, box of 10 Activated carbon absorbs more toxins while exhalation valve makes it easier to breathe Latex-free headstrap, smooth inner lining, embossed fringe seal Contour fit design, adjustable nosepiece, comfortable nose foam Meets CDC Guidelines for TB Exposure as well as NIOSH standards