What is the dress code for Muslims?

Islam emphasizes modesty. No person should be perceived as a sex object. There are certain guidelines both for men and women that their dress should neither be too thin nor too tight to reveal body forms. 

For men, they must at least cover the area from the knee to navel ....and for women, their dress should cover all areas to be properly veiled Q 24:31. Some Islamic scholars grant license based on Quran & Sunnah creating some latitude allowing believing women to cover everything but the FACE and HANDS.