PolyGARD Silicone Reusable Full Face Silicone Mask FFS680 is lightweight, easy to use and comfortable to wear. The full-face polycarbonate lens provides a wide field of vision and excellent visibility, and the glass is scratch- and impact-resistant. The dual filter design provides better weight distribution and provides lower breathing resistance. The 4 head strap system makes it easy to put on and take off. Wide selection of filters: gas, vapor and particulate filters. The exhalation valve provides less resistance to exhalation, making it easier to breathe, accumulating less heat and sweat, and directing the flow of exhaled air downwards. Meets the requirements of EN136: 1998 standard. The filters are attached with a Bayonet connector.