Men's Formal Trouser offered, is a type of pant which is worn by men to give a formal look. This slim fit trouser adds the look and feel of a thin jean but in a more sophisticated design. It is the best way to spice up a classic look, whether it's a suit or separates. Men's Formal Trouser is great to wear. You'll want to be able to move around and keep your dignity while appearing like the freshest guy in the room, so don't make these pants too tight.