Lightweight composites are materials made from two or more different substances that combine to create a stronger and lighter product. These composites often consist of a matrix, such as plastic or resin, reinforced with fibers like carbon or glass. This combination enhances strength while reducing weight, making them ideal for various applications, including aerospace, automotive, and sports equipment. The use of lightweight composites helps improve fuel efficiency in vehicles and aircraft, as lighter materials require less energy to move. Additionally, they offer increased durability and resistance to corrosion, making them a popular choice in industries that demand high performance and longevity.