Features Butyl rubber face seal with single front filter port. Polycarbonate face shield. Light weight with compact large field of vision. Easy maintenance. Full-face mask is fitted by headpiece with 6 straps, which can be adjusted to ensure perfect fit over face. Internal nose and mouthpiece allow air inhaled to pass through the visor without causing condensation or misting and reduces un-used space inside mask to prevent build-up of carbon dioxide from the air exhaled. Although these products are brand new and have been rigorously tested, they are sold as a 3rd party company and we are not liable for any misuse or malfunction.