DescriptionThese ventilator filter cotton can effectively filter fine particles, dust, and pollen.This can ensure you can breathe clean, hygienic and high-quality air when using the ventilator. It is one of the best choices for you. This filter cotton pad can not only help you keep your lungs clean, but also prevent dust, dirt and other substances.Features- Color: White. - Material: Cotton. - Size: 5.3 x 3.5 x 0.1 cm/2.08 x 1.37 x 0.03 inch. - Replace the filter that is no longer able to filter properly. Then you can enjoy a quiet sleep and a peaceful environment for your family. - Made of cotton material for safe use. - Disposable ultra-fine filter blocks fine particles. - Effectively filter PM2.5 fine particle dust in the air. - This can ensure you can breathe clean, hygienic and high-quality air when using the ventilator.