FluidRide: Provides the ultimate combination of bounce back and cushioning properties with reduced weight and exceptional durability Rearfoot and Forefoot GEL Cushioning Systems: Attenuates shock during impact and toe-off phases, and allows movement on multiple planes as the foot transitions through the gait cycle FluidFit: Combines multi-directional stretch mesh with stretch reinforcements that adapt to the athlete's foot, creating a truly customized glove-like fit Heel Clutching System: Exoskeletal heel counter provides improved support and creates improved heel fitting environment Guidance Line: Vertical flex groove decouples the tooling along the line of progression for enhanced gait efficiency Guidance Trusstic System: Enhances gait efficiency while providing midfoot structural integrity ComforDry Lasting and X-40 Sockliner: Ultimate cushioning and comfort Gender-Specific Cushioning: Features a lower density top layer in the midsole, allowing female athletes to better enjoy the benefits of midsole compression Heel-To-Toe Drop: 13mm Predecessor Product Type: GEL-Nimbus 16