A blazer is a structured, tailored jacket that is a key piece in both men's and women's wardrobes, often associated with formal or semi-formal attire. Originally derived from military uniforms, it has evolved into a versatile garment that can be worn for various occasions, from business meetings to casual outings. Blazers typically feature a single or double-breasted design, lapels, and a button closure. They come in a range of fabrics, including wool, cotton, linen, and blends, making them suitable for different seasons.