Dress
The traditional dress of Mongolia is called the deel (or del), which is similar to a loosely-fitting large coat closed with buttons. The deel is worn by both men and women and there are multiple styles and thicknesses as they can be worn during the warmer summer months or the cold winters. Women generally wear more brightly colored deels, while men tend to prefer browns and other dark colors. Belts, boots, and hats are also obligatory items in the wardrobe. Belts and hats are worn year round with thicker hats during the cold months. Boots can also be worn year round with riding boots in the summers and heavy felt boots in the winter.
Today this traditional dress is still commonly worn in the country, but people in Ulaanbaatar and other large cities are moving to more western-styled clothing and today this is the norm. As a visitor to Mongolia be aware of your surroundings when you decide what to wear. The people in the cities are fairly accepting of all dress, including showing legs or arms, but in the countryside the people are more conservative and will stare oddly at you, and not just because you're foreign. Most Mongolians will frown upon dress that is too revealing or too tight so, even in cities, dress on the conservative side when in doubt.
Additionally, some of the population, particularly in the western part of the country, is Muslim. If in a Muslim area, there are a number of religious laws which should be obeyed, such as women should cover their hair at all times in public and both women and men are expected to cover their legs and shoulders; showing your knees and/or shoulders can be very offensive to Muslims.