Trusstic System (1997):

The Trusstic System is a plastic bridge located under the arch of the foot in ASICS shoes. It reduces the weight of the shoe and provides stability to the foot. The Trusstic System is a lightweight plastic bridge located under the arch of the foot in ASICS shoes. It provides stability and support to the foot, reducing the risk of injury and improving the overall performance of the shoe. 

The Trusstic System also helps to reduce the weight of the shoe, making it more comfortable for the wearer.