How about the mouthpiece of Henan Siyuan Medical Equipment Co.

Henan Siyuan Medical Devices Ltd. masks are good. Masks of Henan Siyuan Medical Devices Co., Ltd. can filter more bacteria and viruses because of good material and affordable price. The mask of Henan Siyuan Medical Devices Co., Ltd. can block the role of harmful gases, odors, droplets, viruses and other substances, made of gauze or paper and other materials.