hairnet
From Longman Dictionary of Contemporary EnglishRelated topics: Hair & beautyhairnethair‧net /ˈheənet $ ˈher-/ noun [countable] DCBa very thin net that stretches over your hair to keep it in placeExamples from the Corpushairnet• She is a big lady and with that hairnet on, her head looks like a helmet.• C: What net's that, Geoffrey, your hairnet?