The 3Mmaintenance-free 4251+ half mask offers you effective respiratory protection as a user-friendly complete mask. The new, improved exhalation valve reduces breathing resistance during exhalation, reduces heat and moisture formation, making breathing easier, especially in hot and humid working environments. Our half masks series 4000+ has a soft, skin-friendly, silicone-free face sealing. The filter class FFA1P2 R D protects against many of the common organic gases, vapors and particles in the industrial environment. The light, well-balanced design with the integrated, maintenance-free filter elements provides a good peripheral view.The integrated filter elements are maintenance-free. You can use the half mask until a change according to the filter change plan is pending or the filter elements are saturated. Then dispose of them properly. The comfortable straps with adjustable head holder offer a secure fit and adapts to different head shapes and sizes. The flat design does not re