Description: The mask is folded in 6 layers to form a three-dimensional breathing space;it has a hidden plastic bridge of the nose, prevents fog, and has a hidden cartilage bridge of the nose, which can avoid gaps and reduce the inhalation of harmful substances through adjustment. High elastic ear hanging, lower pressure. Features: Safe, breathable, and Hypoallergenic; and high filtration, capacity. Elastic ear-loops with no pressure to the ears. Provide some protection against dust, or some poisonous things. Clean and helpful, it is great for woodworking, house cleaning and general maintenance. Made of non-woven material, they are featuring good skin tolerance and comfortable to wear. Without glass fibers. Great choices for you or your family. One size fits most.