ASICS GEL-Nimbus 20 Women's Running Shoes Blue Print : For serious neutral runners from various levels, the ASICSA(R) GEL-Nimbus 20 running shoe continues to be the ultra-cushioned favorite. In its twentieth year, the Nimbus brings runners a lightweight, responsive shoe thanks to FlyteFoamA(R) technology and a jacquard mesh FluidFitA(R) upper for a more personalized fit. The womens version offers a lower-density top layer in the midsole, allowing female athletes to better enjoy the benefits of midsole compression. Upper: FluidFitA(R) combines multi-directional stretch mesh with stretch reinforcements that adapt to the athletes foot and create a truly customized glove-like fit. Heel Clutching System provides improved support and creates improved heel fitting environment. Seamless Construction reduces the potential for irritation and friction caused by traditional stitches and seams. Discrete Eyelets disperse lace tension and create a customized fit environment and enhanced upper comfort. Mesh provides breathable flexibility. Midsole: FlyteFoam(TM) Midsole technology provides optimal comfort and a responsive ride. FluidRide(TM) provides the ultimate combination of bounce back and cushioning properties with reduced weight and exceptional durability. Rearfoot and Forefoot GELA(R) Cushioning Systems attenuate shock during impact and toe-off phases, and allow movement on multiple planes as the foot transitions through the gait cycle. Guidance Trusstic System A(R) integrates Guidance LineA(R) construction for enhanced gait efficiency while providing midfoot structural integrity. Plus 3A(R) midsole technology offers 3mm of additional height on women's models helps relieve achilles tension. Outsole: Guidance LineA(R) vertical flex groove decouples the tooling along the line of progression for enhanced gait efficiency. AHARA(R) ASICS High Abrasion Rubber placed in critical areas of the outsole provide exceptional durability.