ASICS Little Kid/Big Kid GEL-Kayano 16 Running Shoe 100% Synthetic and mesh Rubber sole Impact Guidance System employs linked componentry that enhances the foot's natural gait from heel strike to toe-off Guidance Line is a vertical flex groove that decouples the tooling along the line of progression for enhanced gait efficiency, and Plus 3 technology offers 3mm of additional height on women's models to help relieve achilles tension Asymmetrical Lacing Design reduces the potential for irritation and provides improved comfort and fit Soft Top DuoMax provides greater comfort and enhances gait efficiency