ASICS GEL-Kayano 19 GS Running Shoe (Little Kid/Big Kid) 100% Synthetic Leather/Fabric Imported Rubber sole Heel measures approximately 1" Platform measures approximately 0.75" Synthetic Contains reflective materials designed to enhance visibility during low-light hours. ASICS High Abrasion Resistant rubber on the outersole. Helps cut down on excessive wear. As part of biomorphic a new lacing system that uses independent placed eyelets. This evens the lacing tension across the foot creating a customized fit and enhanced upper comfort. An upgrade of the current DuoMax system by distributing local pressure proportionally to increase stability while providing improved comfort.