Disposable civil protective mask Disposable civilian protective masks are made of two layers of non-woven fabrics and a layer of filter materials; the nose bridge is made of environmentally friendly all-plastic strips, does not contain any metal, and is equipped with breathable, comfortable, especially suitable for electronic factories, daily life . Disposable masks should be used within the validity period; only for one-time use, and destroyed after use; damaged packaging, prohibited to use; pay attention to the date of production.Disposable Mask pricelist website:http://www.kn95maskfactory.net/mask/disposable-mask/