ASICS Women's GT-2000 4 Lite-Show PG Track Shoe 100% Textile and Synthetic Imported Rubber sole Shaft measures approximately 2.5" from arch fuzeGEL Midsole: ASICS new GEL cushioning technology made from the fusion of GEL and foam creates lightweight comfort, tuned to provide rearfoot shock absorption that shifts to forefoot bounce back. Reflectivity: Contains reflective materials designed to enhance visibility during low light hours. FluidRide Midsole: FluidRide provides the ultimate combination of bounce back and cushioning properties with reduced weight and exceptional durability. Dynamic DuoMax Support System: This evolution of DuoMax system enhances stability and support, with reduced weight and increased platform support. 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.