Activated carbon cotton cloth] Activated cottoncloth multiple uses to protect your lungs from pollution, carbon, building dust, paint, particles, insulating materials and other pure cold air pollution. Our masks carbon cotton cloth Block out 99% of all harmful particles in the air that your eyes cannot see. For comfort, our masks include[ ACTIVATED CARBON ADVANTAGE ] Charcoal Block have been used in the mechanical and health industry for almost a century. It is a powerful substance that eliminates harmful air particles using an advanced process called chemical absorption. With our Block, we've harnessed the absorbing power of activated carbon to help defend your respiratory system. When you breathe through the mask, the particles stick to the carbon and stay in the Block, preventing them from entering your lungs.[ COMFORT DESIGN ] If there was one feature we made sure our mask excels in, it would be comfortability. No one likes an itchy and uncomfortable mask that you get soo fed up with and end up just taking off. We want you to thoroughly enjoy our mask, which is why we made it with soft, but yet BREATHABLE fabric. Even the adjustable elastic straps that go around your ears and the flexible band around your nose were designed with your comfort in mind. Say goodbye to red lines and soreness forever![ BREATHABLE ] mask is focused on not only keeping harmful air out but being able to breathe comfortably at all times. This is extremely important when wearing these masks. That is why our mask is preferred by many athletes & construction workers who are doing vigorous physical activity.Activated carbon cotton clothDust Pollution Mask is cotton with dust double-layer .Makes it perfect for sports, running, hiking, mountain climbing or average daily use. This mask dust, air pollution, vehicle exhaust and sand blowing.The N99 dust mask is designed for multiple uses to help your lungs from pollution, carbon, building dust, paint, particulates, insulated air, and more. For comfort, our masks are made of breathable soft cotton fabric and a lightweight elastic strap that fits all heads.