Size: Medium/Large Silicone facepiece material conforms to facial features and doesn’t harden with age Easy to clean and resists distortion. Protects the wearer’s eyes and face against irritating gases, vapours and flying objects. Oral nasal cup reduces fogging and lessens dead air space to improve comfort. Speaking diaphragm makes communication easy. Five-strap harness provides an effective and comfortable facepiece to face seal. Hard-coated polycarbonate lens provides over 200 degree field vision.