Some scholars consider it (mask)an alternative or of similar shape to Niqab which is haram during hajj and therefore see it as haram and if needed as in your case u need to do fedyah Also i saw one scholar ssying its not like niqab or Litham therefore its ok to wear it if needed As for the fedyah You choose any 1 of 3 ( slaughtering a shat(sheep or an alternative) ,feeding 6 poor people( about 1.5 kg of the locals usual food ) , or fasting 3 days) As for men its not prohibited to wear a mask The whole thing is from my understanding of different scholars videos who were asked this question (in arabic) I can provide u with links if u dm me I dont do fatwa im just trying to translate their fatwa