Core features:
Filter type: It relies on ambient air and filters toxic substances through the agent in the filter tank, as opposed to "self-contained" (with its own air source).
Self-rescue escape: The design is intended for one-time escape use only, not for firefighting or rescue work.
Protection time: Usually provides 15, 30 or 60 minutes of effective protection, depending on the model and the user's breathing rate.
Main components:
Hood or face mask: usually made of high-temperature flame-retardant material (such as aluminum foil composite cloth), with large windows.
Canister: core component, with high efficiency filter layer and carbon monoxide catalyst.
Neck tightening device: ensure that smoke does not enter through the neck.