Wiktionary
construction helmets
n. (plural of construction helmet English)
Usage examples of "construction helmets".
Five minutes later Bart reappeared with two burly men dressed in bloodstained long white coats, yellow plastic construction helmets, and yellow mid-calf rubber boots.
Approaching by inches, they eventually saw a covey of city sewer workers in quilted vests and construction helmets leaning on the yellow rail they'd erected around an open manhole.