The vitrex premium power tool mdf valved moulded masks have a breathe easy valve offers extra comfort when exerting greater physical effortbody movement ideal for working in confined positions ie when crouching or bending protects lungs against fine toxic particles ideal for use with mdf softwoods hardwoods metals and concrete suitable for use with most power tools drills saws grinders sanders routers etc en149200143 a12009 ffp2 nr