From Longman Dictionary of Contemporary Englishsafety harness/helmet/glasses etcsafety harness/helmet/glasses etcequipment etc that keeps you safe when you are doing something dangerous → safety
Examples from the Corpus
safety harness/helmet/glasses etc• Protective gloves and a safety helmet are worn to minimize injury.• They clip it into a safety harness, attaching it to Doug.• Full transparent face shields or visors may be specified as an alternative and are sometimes an integral part of a safety helmet.• Steven put his safety helmet further back on his head.• At the first change over it's off with the shoes and on with the safety helmet.• The safety helmet was another of his discoveries, his good ideas. 