ASICS GEL-Nimbus 17 running shoes are cushioned, plush shoes that give underpronators to mild overpronators a luxurious ride. With even more weight loss than previous models, this version is lighter and quicker to deliver fast runs. A more innovative and nearly seamless upper feels and looks like a dream.Upper: FluidFit® combines multi-directional stretch mesh with stretch reinforcements that adapt to the athlete's 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: Gender-Specific Cushioning features a lower-density top layer in the midsole, allowing female athletes to better enjoy the benefits of midsole compression. Plus 3® offers 3mm of additional height on women's models to help relieve Achilles tension. FluidRide™ provides the ultimate combination of bounce back and cushioning properties with reduced weight and exceptional durability. Rearfoot and Forefoot GEL® 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® integrates Guidance Line® construction for enhanced gait efficiency while providing midfoot structural integrity. ComforDry™ X-40 Sockliner features higher rebound properties while providing excellent moisture management, high-level breathability and antimicrobial properties. Outsole: Guidance Line® vertical flex groove decouples the tooling along the line of progression for enhanced gaitefficiency. AHAR® ASICS High Abrasion Rubber placed in critical areas of the outsole provide exceptional durability.