"Wrinkle-free" refers to fabrics or clothing that resist creasing and maintain a smooth appearance without the need for ironing. This quality is often achieved through special treatments or the use of synthetic fibers, such as polyester or nylon, which help the material retain its shape. Many clothing brands offer wrinkle-free options, making them popular for travel and everyday wear. These garments are designed to be low-maintenance, allowing individuals to look polished without the extra effort of pressing or steaming. Common examples include dress shirts, suits, and casual wear that are marketed as wrinkle-free.