Owfeel Half Face Dust Respirator Mask with Adjustable Strap DUST MASK: Package With One half face mask and 20 Pcs eepaceable filter cotton ACCESSORIES: These Filter Cotton is designed for the Half Face Dust Respirator Mask DESIGN: A unique face seal design providing a high protection factor. Material: Face piece is made of heat treated silicone with minimal risk of contact allergies. Adopts high electrostatic adsorption BFE filter material,resist efficiently dust particles 95% above Professional protection expert for you.