Brand IRUDek Lightweight, easy-to-store mask Designed with a low profile. Being light, it provides greater comfort for work. Modern technology for sewing through Ultrasonic welding, avoid holes of the Needles in the mask. High technology in medium and charge filters electrostatic to prevent lint from entering the filter. One-way exhalation valve for reduce CO2 and humidity, and facilitate communication. The sewn on the outside and without metal parts, offers a better fit without pressure. For added hygiene, packaged individually. CO: Made in Germany