• 99.99% filtration: The market leader in respiratory masks with replaceable HEPAC filters allows filtering dust and other particles smaller than 0.03 microns for safe work. • Facial fit verification technology: The advanced system with push-button mechanism ensures quick and easy validation of the mask's tightness with each use. • Optimal comfort: Designed for all construction applications, with two straps behind the head and facial fit verification technology, it is a super comfortable anti-dust respiratory mask, with a downward-facing valve to reduce fogging of glasses and eye protection due to condensation. • Safe materials: The mask is equipped with a latex and silicone-free facepiece for maximum tightness and comfort throughout the day in any work environment requiring an FFP3 mask. • Super lightweight: Made with ultra-lightweight TPE material, making it the lightest anti-dust mask on the market, easy to carry from home to work or between sites.