Respirator With Exhalation Valve, Exhalation Valve Reduces Heat & Humidity Build Up, Heavy Duty Fully Adjustable Elastic Straps For Optimum Fit & Comfort, Electrostatic Filter Media Traps Dust & Harmful Particles While Maintaining Low Breathing Resistance, Latex Free & Hypoallergenic For Users With Sensitive Skin, NIOSH Approved, N95 Class.