For just $15, you can have your own GP-5 Original Soviet Civilian Protective Gas Mask. The seller reassures us that the standard issue asbestos filter has been replaced by activated charcoal. Shipping is free. From the product description:
It is one of the most popular and truly reliable civilian gas masks produced in the Soviet Union from 1970 to 1989. The GP-5 was made famous for its apparent use in Chernobyl after the nuclear disaster. It can operate in all weather and withstand temperatures from −40 degrees (Celsius and Fahrenheit) to 114 °C (237 °F). The GP-5 also comes with sealed glass eye pieces. They were originally made to protect the wearer from radioactive fallout during the Cold War and were distributed to most fallout shelters. They have recently been tested to see if they have NBC (Nuclear, Biological and Chemical) protective capabilities. It was concluded that the mask will last in an NBC situation for 24 hours.
GP-5 Original Soviet Civilian Protective Gas Mask (Amazon via Daily Grail)