Amazon.com | Asics DYNABLAST 3 Mens Running Shoes, Island 。* Engineered knit upper: Improves breathability * FLYTEFOAM BLAST technology: Provides lightweight cushioning and a responsive rebound * Underfoot cutouts: Provide excellent bounce * OrthoLite X-30 sockliner: Provides soft step-in comfort * AHARPLUS outsole rubber: Improves durability. * Material: synthetic The DYNABLAST 3 shoe is designed for the fitness enthusiast seeking a comfortable offering for their run or training routine. A soft, engineered knit improves the shoe\'s fit, comfort, and breathability. This material is also reinforced with a notched tongue construction that helps reduce pressure points over the in-step. The FLYTEFOAM BLAST cushioning\'s energized softness provides a trampoline effect as you run. It helps create a smooth yet responsive feeling underfoot.