An air spring is a type of suspension system that uses compressed air to support weight and absorb shocks. It consists of an air-filled rubber or plastic bladder that expands and contracts as needed, providing a smooth ride. Air springs are commonly used in vehicles, such as trucks and buses, to enhance comfort and stability. These springs can be adjusted for different loads, making them versatile for various applications. By changing the air pressure inside the spring, operators can modify the vehicle's height and handling characteristics. This adaptability is particularly beneficial in industries like transportation and construction.