Prayer: Praying in Abnormal or Humiliating Clothing
Practical Laws of Islam as per the teachings of Ayatullah Sistani
Ruling 831
Wearing clothing made of a material, colour, or style that is not normal for someone who wants to wear it is unlawful if it would cause him disrespect and humiliation. However, his prayers are valid if he performs prayers in that clothing, even if that is his only covering.