Avia - A2015w (White/Silver/Lupine Purple) - Women's: DCS(R) Plus Dual Cantilever(R) System with pressurized air chamber in heel which maximizes stability and cushioning with two interacting dual Cantilever(R) units. These units act like a trampoline to soften impact, stabilize the heel, and return energy to the stride. Anatomical Cradle which improves both motion control and shock absorption by mimicking the bottom of your heel in your midsole. Also reduces twisting on both ankles and knees. Lightweight leather upper, synthetic and breathable mesh with reflective features. Removable molded Duropontex sockliner and compression molded EVA midsole. Vented TPU shank. Solid rubber outsole with vented TPU shank.