Oman is a Muslim country
Of course, this can be said of many countries, but in Oman, it is very visible and has an impact on tourists. It means that if you're visiting Oman, you'll need to follow a strict dress code. This is definitely one of the top Things about Oman You Should Know. If you are simply visiting the capital and will not be traveling throughout the country, you may be able to get away with wearing regular summer clothing, although this is not always the case. For example, you can only enter a mosque or a local festival if you can persuade people of your clothing's "decency."
Women visiting Oman should wear clothing that covers the majority of their body, such as long light trousers or skirts/dresses, T-shirts without a neckline, or long sleeves that cover at least the shoulders. Long, light slacks and T-shirts with sleeves that cover the shoulders are also recommended for men. This will prevent you from receiving sidelong stares and being accused of disrespecting Omanis.