Materials: Polypropylene non-woven fabrics, Polypropylene Melt-bown and activated carbon. WARNING: This device is not a medical device within the meaning of Directive 93/42 or Regulation EU / 2017/745, nor is it a personal protective equipment within the meaning of Regulation EU / 2016/425. Do not wash, clean or rub the filters. Single use only. Personal use. The filter is not reusable. Not sterile