Cotton mask with a breathing valve perfect against smog. Reusable and suitable for personal and professional usage, indoor and outdoor, travel and work. The cotton material can filter out most particulates in the air. Available in a large number of shapes and colors for you to choose. Adjustable ear-loop and nose band to fit any face shape, easy to wear and comfortable. This Mask is not a medical grade or a direct substitute for N95, surgical, or procedural masks and should NOT be used as a replacement for approved face mask or any other PPE.