Runners looking for the lightest running shoe that doesn't skimp on cushioning will love the new Asics Dynaflyte™. This ultra-lightweight shoe features a seamless upper and a FlyteFoam™ technology that allows for taking on longer runs. These features combined with bold colors bring an element of excitement to these trainers that will inspire you to start working on your next PR. Upper: Seamless upper combines engineered mesh and no-sew overlaysthat stretch, hug and move with the foot. Padded tongue and heel collar enhance comfort. Discreet eyelets and lace-up front offers a personalized fit.Midsole: Impact Guide System (I.G.S.®) employs linked componentry to enhance the foot's natural gait from heel strike to toe-off. ComforDry™ sockliner provides cushioning performance and plush luxury with antimicrobial properties for a cooler, drier and healthier environment. Rearfoot GEL® Cushioning System attenuates shock during impact and toe-off phases, and allow movement in multiple planes as the foot transitions through the gait cycle. Removable insole. Outsole: AHAR® ASICS High Abrasion Rubber placed in critical areas provides exceptional durability.