Asymmetrical lacing design provides a comfortable and customized fit The ASICS Mens Dynablast 2 Running Shoes are designed to provide runners with a comfortable ride. These shoes are responsive and made to improve your post-run feeling. The circular knit upper improves airflow and provides a supportive foothold. The FF BLAST technology provides lightweight cushioning and a responsive rebound. The underfoot cutouts provide excellent bounce. The OrthoLite X-30 sockliner provides soft step-in comfort. The asymmetrical lacing design provides a comfortable and customized fit.