Masks Dust Mask Polyethylene Comfortable, reliable protection against the inhalation of dust particles, cleaner or light chemical fumes. The mask is lightweight and comes with elastic straps and an adjustable nose bridge to fit any face shape. Moldex N95 Disposable Dust Mask Respirator with exhale valve keeps you cool longer. Pleated Mask 3-ply pleated procedure mask made from non-woven polypropylene is a barrier against fine dust and dry particles. © 2018 Guelph Paper & Cleaning Supply Co. Ltd.