Cotton fabric, features a sewn-in Pocket for optional removable filter (filter not included),this facem mask can protcet you from dust, small particles on air, pollen and much more. Reusable and machine-washable. The ear loop of face mask is adjustable, one size fits most people. Suitable for outdoor, school, supermarket, and other large-scale activitie. 5 21/64" x 9 1/16"