What is the ruling of wearing a mask in ihram?
بِسْمِ اللهِ الرَّحْمنِ الرَّحِيْم
In the name of Allah, the Most Gracious, the Most Merciful
According to the Ḥanafi madhhab, wearing a face mask is not permitted and will necessitate an obligatory ṣaḍaqah (2.32kg of wheat or its value in cash) if worn for a short while. If it is worn for a complete day or night, paying the damm will be wājib.
Only Allah knows best
Written by Maulana Tahsin Alam
Checked and approved by Mufti Mohammed Tosir Miah
Darul Ifta Birmingham
 Mufti Abdul Qader Hoosen, Hajj and Umrah Q&A, pg. 24.