Description Are you looking for a professional, yet affordable filter cotton pad? If yes, look no further! This professional replacement filter cotton pad must meet you needs. It is one of the best choices for you. Features - Color: White. - Material: Cotton. - Size: About 5.3x3.5x0.5cm. - Brand new and high quality. - Disposable ultra-fine filter blocks fine particles. - Effectively filter PM2.5 fine particle dust in the air. - White filter cotton is recommended to replace 1-2 pieces in 1 month. - Not only help you keep your lungs clean, but also prevent dust, dirt and other substances. Package include 20 x Filter Cotton