Many visitors don't realize Masjid Sultan (Sultan Mosque) in Kampong Glam has strict dress code requirements. You need to cover shoulders, arms, and legs completely. Women must cover their hair.

The mosque provides free scarves and robes at the entrance, but they run out during busy periods (especially Friday prayers and weekends). Best to bring your own scarf or lightweight long-sleeved shirt. Visit between 9am-12pm or 2pm-4pm for the quietest experience and guaranteed entry. Free entry, just remove shoes and respect prayer times.