The ASICS Hyper Speed 4 is a lightweight racing shoe designed for daily training and competitions. It features FLYTEFOAM midsole technology, offering a lightweight and responsive cushioning suitable for tempo runs or races. The upper is made of high-strength polyester mesh, enhancing durability and breathability to keep your feet cool and comfortable. The AHAR low-density durable rubber outsole provides lightweight durability, adapting to various terrains. The split heel design helps maintain stability on different surfaces. It's recommended to size up half a size due to its snug fit.