Ferro silicon is an atomized alloy,which is formed by combining iron and silicon with a silicon content range of 15% to 90%.Ferro silicon is a universal "heat blocker" used in the production of carbon and stainless steels.
1.Individual package: Safe and hygienic, easy to carry2.Soft Nose Clip: Memory material is used for pressing nose, which can effectively prevent mask from falling off and is safer.3.High elastic belt: more comfortable and not tight.4.This is 3ply face mas