Using environmental protection material, easy dust, comfortable breathe freely, environmentally friendly antibacterial fabrics, size adjustable, have children, little face, big face, can be washed repeatedly, not deformation, used multiple times and 3 d for paragraphs without adult three-dimensional structure qiu dong 4 layer dust prevention windproof warmth washable adjustable mask 10 monochromatic a variety of specifications variety of color, can consult customer service for details