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4890 BLUE PURPLE/BLACK/ FLASH CORAL - BLUE PURPLE/BLACK/ FL. FluidRide® Midsole: FluidRide® provides the ultimate combination of bounce back and cushioning properties with reduced weight and exceptional durability. Gel-cumulus® 19 also sports a contemporized upper to signal the latest generation.4890 BLUE PURPLE/BLACK/ FLASH CORAL - BLUE PURPLE/BLACK/ FL Guidance Trusstic System® Technology: This Trusstic System® integrates Guidance Lin Featuring our convergence gel® technology and Rearfoot gel® cushioning technology, our GEL-Cumulus® 19 delivers superior comfort and shock dissipation, while enhancing foot function for a smooth ride.