Islamic teachings emphasize modesty for both men and women, but there is no single worldwide Muslim dress code enforced in the same way everywhere. Qur’anic verses, hadith, legal schools, local culture, personal conviction, and state law all influence how Muslim women understand hijab and modest dress.

Qur’anic foundations
Qur’an 24:30 first instructs believing men to lower their gaze and guard chastity. The following verse addresses women, including an instruction to draw their coverings over the chest and to observe modesty in displaying adornment.
Qur’an 33:59 also addresses outer garments in a specific social context. Muslim jurists and interpreters have debated how these texts apply to clothing.
What hijab means
Hijab can refer broadly to modesty and boundaries, but in everyday modern usage it often means a headscarf covering the hair and neck.
Many Muslim women wear hijab as a religious practice. Others interpret the requirements differently or do not wear a headscarf.
Niqab, abaya, and other clothing
Niqab covers the face except the eyes, while abaya commonly refers to a loose outer garment in parts of the Arab world. Burqa refers to a different full-body covering associated especially with Afghanistan and nearby regions.
These garments should not be treated as interchangeable or as a universal Islamic uniform.
Sharia and state law
Classical Islamic jurisprudence contains rules of modesty, but modern governments apply dress law very differently. Some states impose legal requirements, while others restrict religious clothing or leave dress largely to individual choice.
State enforcement should be distinguished from personal religious observance.
A balanced answer
Islamic modesty is a real religious teaching, but the exact clothing used to express it varies across law, culture, interpretation, and personal practice.