ASICS GEL-Cumulus 20 Women's Running Shoes Dark Grey/White : The new ASICS GELA(R)-Cumulus 20 running shoes feature new improvements that make the running experience even more enjoyable! This new installment is even lighter than its predecessors but includes a more responsive ride because of an EVA foam addition to the FlyteFoamA(R) midsole cushioning. A flexible, stretch mesh upper and a more roomy toe box provides a more comfortable, adaptive fit. Upper: Flexible upper design features engineered mesh and no-sew overlays that stretch, hug and move with the foot. Padded tongue and heel collar enhance comfort. Midsole: FluidRideA(R) combines cushioning and lightweight responsiveness. Impact Guidance System (I.G.S.A(R)) employs linked componentry to enhance the foot's natural gait from heel strike to toe-off. GELA(R) Cushioning Systems attenuate shock during impact and toe-off phases and allow movement in multiple planes as the foot transitions through the gait cycle. FlyteFoamA(R) Midsole technology is lightweight and provides long-lasting, responsive cushioning. Outsole: Guidance Trusstic SystemA(R) provides a lighter and stable outsole. AHARA(R) ASICS High Abrasion Rubber placed in critical areas provides exceptional durability.