Features: Non-woven (Multi effect insulation safer protection. Breathable and skin friendly, it offers you a safe breathing experience. More effective insulation and protection, more reassuring electrostatic adsorption particle. Put the disposable face mask on the inner side of the common face mask, and it can be replaced if there is peculiar smell. Description: It can effectively filter out mist, dust and other fine particles, prevent second hand smoke and car exhaust. Suitable for professional protective mask, disposable mask, ordinary civilian mask. Specifications: Name: replacement filter pad face masks Material: spunlaced viscose nonwoven fabric Item size: 120 * 90mm / 4.72 * 3.54inch Package Included: 100 x mask filter pads Notes: 1. Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures. 2. Please allow slight dimension difference due to different manual measurement.