The respirator is designed for use for particles such as those from grinding, sanding, sweeping, sawing, bagging or other dusty operations. This respirator can also help reduce inhalation exposures to certain airborne biological particles (examples: mold, bacillus anthracis, mycobacterium tuberculosis), but cannot eliminate the risk of contracting infection, illness or disease. This respirator is compatible with a variety of protective eyewear and hearing protection. Fitted with a 3M cool flow exhalation valve, this respirator is ideally suited for work situations involving heat, humidity or long periods of wear. The proprietary 3M cool flow valve is designed to release hot, humid exhaled breath quickly, helping to prevent an unpleasant build up of heat inside the facepiece a significant cause of discomfort to respirator wearers. The cool flow valves efficiency in keeping breathing cool and comfortable has been demonstrated through testing the atmosphere inside a respirator with a cool flow valve is on average 7.5F cooler than the similar product without the valve. This makes cool flow valve respirators ideal for long periods of wear, especially where conditions are hot, humid or physically demanding. Testing conducted in a 3M laboratory.