The Moldex 0092 replacement head harness is intended to replace the head harness for the Moldex 9000 series respirators. Save costs by only buying the replacement parts you need instead of an entire new unit. 9000 series respirators are designed with an over molded lens so that there are fewer overall parts to replace. This respirator is designed to be light and comfortable for all day wear. This head harness pulls away for an extra wide opening so the respirator can be quickly and easily put on. Ensure your 9000 series respirators last and maintain their safety by regularly inspecting and replacing the head harness.