8 hours and Multishift use per filter for all day protection 99% filtration efficiency Captures dust as fine as 0.3 microns at 50 litres per minute Suitable for all woodworking tasks, masonry and demolition work, fibreglass, mixing concrete, mortar and plaster, welding, hand and power sanding and many more Full moulded facepiece structure for ultimate face seal Downward facing exhalation valve – no misting or steaming of goggles
