SR-4

It is air-purifying respirator for single use providing protection against toxic carbon monoxide (CO), airborne participates, dust, smut and other gases emitted in underground mine fires or explosions.
• The filtering self-rescuer is immediately ready-for-use after opening and removal from the container. It has a hypoallergenic mouthpiece and a nose clip to reliably protect the user from the contaminated ambient air. 
• The mouthpiece can’t be destroyed during operation.
• The adjustable head harness provides tight fit and hands-free usage.
• The sturdy chemically-stable container from thickened metal is hermetically sealed, providing long-lasting protection for the respirator.
• The filtering self-rescuer SR-4 was designed specially for miners and for emergency evacuation from dangerous zones