Force 8 'Press To Check' P3 Dust Filters allow air to flow across the full area of the filter material, increasing efficiency and extending life. Large open area allows for lower breathing resistance and improved comfort. Features a built-in inhalation valve making the respirator easier to maintain. Low profile cover protects the enclosed pleated filter from moisture and foreign objects that could damage the pleats. Easily attaches to the Force 8 respirator with a secure fit when applied.