Light fabrics such as linen, cotton, and athletic wear designed for hot weather are ideal. Be sure to dress modestly, covering from your shoulders to below your knees. Women, in particular, are expected to dress more conservatively than men.
When visiting mosques, women should wear clothing that covers from ankle to elbow, including the decolletage and hair. A few stray strands of hair beneath a headscarf are acceptable; the key is to make an effort. Outside of mosque visits, a headscarf is not required.