Fasting: Does Immersion in a Diving Suit Affect the Fast?

Practical Laws of Islam as per the teachings of Imam Khamenei

Fasting: Does Immersion in a Diving Suit Affect the Fast?

English:

Question #737:

What rule applies to someone who immerses himself in water wearing waterproof clothing such as a diving suit which does not allow the body to become wet?

Answer #737:

If the clothing has close contact with his head, it is problematic to say his fast is valid. Hence, as an obligatory caution he should perform its qaḍā’.

-Imam Khamenei, Practical Laws of Islam, Importance and Conditions of Fasting