A women's brown leather jacket can certainly be worn in casual settings. In fact, it is a very versatile and popular fashion item that can be dressed up or down depending on the occasion. A women brown leather jacket can add a touch of edginess and style to a casual outfit like a t-shirt and jeans or a simple dress. It can also be paired with boots or sneakers for a more laid-back look. While leather jackets can certainly be dressed up for formal occasions, they are more commonly associated with casual and edgy fashion. A black leather jacket may be more suitable for formal occasions, but even then, it depends on the specific event and dress code. Ultimately, the versatility of a brown leather jacket makes it a great addition to any wardrobe, whether for casual or more formal occasions.