A blazer is a type of jacket that is often worn as part of smart-casual or business attire. It typically features a tailored fit, structured shoulders, and a single or double-breasted front. Blazers can be made from various fabrics, including wool, cotton, and linen, and they come in a range of colors and patterns. Originally, blazers were associated with sports teams and naval uniforms, but they have since evolved into versatile wardrobe staples. They can be paired with dress shirts, t-shirts, or even jeans, making them suitable for both formal and informal occasions.