noun
Jocular, humorous term for a surgical face mask, literally 'face pants'. Used playfully, often in casual conversation or online.
花粉症の季節は毎日顔パンツが手放せない。
During hay fever season, I can't go a day without my face mask.
電車の中で顔パンツをしている人が増えたね。
More people are wearing face masks on the train these days, huh.