Twin Half Mask Respirator A1P2 Filter is ideal for using in construction and building work as well as iron and steel working. It is suitable for using to protect your respiratory system when grinding, cutting, welding and milling untreated wood. Can also be used to protect from coal, glass fibre and dust. The half face mask features an adjustable head strap and is designed to be comfortable to wear for longer periods. The filters are fully re-usable and can be replaced if needed.