Among the crowds at Imām Ridhā Mosque, Iran, are many women who dress in Chador.

All mosques have rules regarding cleanliness, as it is an essential part of the worshipper's experience. Muslims before prayer are required to cleanse themselves in an ablution process known as wudu. However, even to those who enter the prayer hall of a mosque without the intention of praying, there are still rules that apply. Shoes must not be worn inside the carpeted prayer hall. Some mosques will also extend that rule to include other parts of the facility even if those other locations are not devoted to prayer. Congregants and visitors to mosques are supposed to be clean themselves. It is also undesirable to come to the mosque after eating something that smells, such as garlic.^[45]

[edit] Dress

Islam requires that its adherents wear clothes that portray modesty. As a result, although many mosques will not enforce violations, both men and women when attending a mosque must adhere to these guidelines. Men are supposed to come to the mosque wearing loose and clean clothes that do not reveal the shape of the body. Likewise, it is recommended that women at a mosque wear loose clothing that covers to the wrists and ankles, and cover their heads with a hijab or other covering. Many Muslims, regardless of their ethnic background, wear Middle eastern clothing associated with Arabic Islam to special occasions and prayers at mosques