This Moldex 2500 N95 particulate respirator features a contoured nose cushion which seals snugly to the face without the need for an uncomfortable metal nose band. Softspun lining cushions the face so the respirator is comfortable to wear even for long periods. The 2500 N95 filter has an added sorbent which helps to relieve workers from nuisance level acid gas (less than OSHA permissible exposure limit.) This respirator is ideal for aluminum reduction, paper mills, coal-fired utility plants, petrochemicals, chemical processing and glass etching. This dust mask also contains an exhale valve which quickly releases hot air so that workers experience less breath resistance while wearing.