ASICS Kids' Gel-Nimbus 19 GS Running Shoe 100% Synthetic Imported Rubber sole I.g.s (impact guidance system) technology: asics design philosophy that employs linked componentry to enhance the foot's natural gait from heel strike to toe-off Fluidride midsole: 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 in multiple planes as the foot transitions through the gait cycle Guidance linemidsole technology: vertical flex groove decouples the tooling along the line of progression for enhanced gait efficiency Seamless construction: the use of seamless materials reduces the potential for irritation and friction caused by traditional stitches and seams