... common sizes what we produced are 175*95mm, with 2 or 3 or 4 layers as well as ... water and bacteria.3. Low breathing resistance with high filtration efficiency.4. With multi-layered non-poisonous, non-allergic, ... , environment friendly. MaterialNon-woven, Meltblown fabric, Customized Stylewith ear loop or tie onApplicationfor medical, surgical, pharmaceutical, laboratorial, industrial sectorColorBlue ...