To filter out dust, smoke, micro-organism, and to prevent cross-contamination as well, KN95 masks are the perfect solution. The butterfly vent valve will allow comfort in breathing and easy communication as well. Its superior design will also help you to easily keep it in your pocket when not in use. Its unique adjuster beads easily fit your face and the aluminum nose clip of the respirator embedded inside the mask will avoid any loosing for the dust particles to find their way. The ear loop elastic is skin-friendly and will not deform with repeated wearing.