A casual women's sleeveless jacket is a versatile and stylish piece that can be worn year-round. It typically features a collar, buttons or a zipper closure, and is made from lightweight materials such as cotton, denim, or linen. This type of jacket can be worn over a variety of tops, including t-shirts, blouses, or even dresses, and can be paired with jeans, shorts, or skirts for a chic and effortless look. It is a great option for layering during transitional seasons or for adding a touch of sophistication to a casual outfit.