500/case (10 bags of 50) - The high value AlphaAir masks are clean, comfortable and provide outstanding particle filtration down to 0.1 micron. The full-length aluminum nosepiece helps provide a perfect fit every time. For softness and reduced particulates, the ear loops and ties are ultrasonically attached. The fluid resistant outer and inner fabric and sonic welded design ensure maximum protection. Available with ear loops or ties.