Upgraded with the all-new FlyteFoam® Propel midsole, the RoadHawk FF 2 delivers a lightweight ride with continuous cushioning. Feel the bounceback with each stride?from soft landing to energized push-off. Its seamless upper surrounds your foot with adaptive support and exceptional breathability in a streamlined, stylish package that begs to hit the road. I.G.S® (Impact Guidance System) Technology: ASICS design philosophy that employs linked componentry to enhance the foot's natural gait from heel strike to toe-off.|FlyteFoam® Propel Technology|AHAR® Plus Outsole: Strategically positioned in critical areas of the outsole, this exceptionally durable compound is 50% more durable than standard ASICS High Abrasion Rubber.|SpevaFoam? 45 Lasting: Employs 45 degree full length SpevaFoam? 45 lasting material for a soft platform feel and improved comfort.|Seamless Construction: The use of seamless materials reduces the potential for irritation and friction caused by traditional stitches and seams.