The Czech CM4 gas mask is intended to protect the face, eyes, and respiratory system from toxic gases, vapors, and aerosols including radioactive dust and biologically harmful substances. The face piece is lightweight and specially designed for extended use with superior comfort, fit, and low breathing resistance. It comes equipped with a 40mm sealed NATO standard filter that directly purifies the gas mask users air for easier breathing. This protective respiratory system provides full facial coverage with dual eye openings for a clear view. Other features include impact resistant protective lenses and a voicemitter that provides clear and effective communication.