Denim shirts are popular for both men and women and come in various styles, such as button-down, Western, or chambray. They often feature contrasting stitching, a pointed collar, and two chest pockets with button flaps. Denim shirts can be dressed up or down depending on the occasion, and they are commonly worn as a casual or work shirt. They can also be layered under a sweater or jacket for added warmth in cooler weather.