Based on your industry or intended use, ascertain whether the mask together with its filter are rated for riot control agents, chemical blowing and other agents such as nuclear and biological substances. Some of the masks that you will find in stores are simply surgical masks which are given too much glory. While they are effective in protecting you from biological threats, it is imperative that you buy gas masks that are capable of handling nuclear as well as chemical threats.
Before purchasing for a specific mask, make certain you discuss this. Where third party testing is possible, it will play to your advantage. The field of view is also a major differentiating factor among the various masks produced today. An ideal mask should guarantee you an unobstructed view in situations which necessitate the use of a mask. Are you the kind of person who lives on prescription glasses? Consider a mask which accommodates spectacles because not all brands do.
Spare filters are necessary aside from having a shelf life, gas mask filters will not effectively serve you for as long as you may think. Some of these filters will require a replacement after some time but this depends on the industry as well as the concentrations of a gas that you are shielding yourself from Even when you wear them in areas where you are not prone to infected air, it is essential to replace them after a few hours.
These calls for several spare filters so that you do not run out of stock when they are needed most once you have a number of filters at hand, ensure that you have all their expiry dates in mind. Never use an expired filter no matter the pressures. Surplus masks may be sub-standard if you are working in an industry prone to gas threats, you probably might have heard of the all surplus’ masks which are mostly associated with the military. You will find them suggestively advertised in catalogs and military retail stores.