All respirators used should be tested and certified by international approval bodies such as National Institute of Occupational Safety and Health (NIOSH) with N95 rating or its equivalent. Particulate respirators with N95 rating offer a minimum of 95% filtration efficiency if worn properly. Using counterfeit respirators that have likely not been tested and certified cannot be guaranteed to perform as promised. This can pose serious health risks.
Here is one way to validate if your 3M™ 8210 N95 Respirator is authentic.