Ecco Receptor - Satelite (Silver/Black) - Women's: Molten leather and textile uppers for long-lasting wear. Heel pull loop. Dual axis forefoot flex channels. Anatomically correct angle of attack heel strike zone. Ballistic Nylon webbing. Ultra light and sleek compression molded Phylon midsole with anatomical underfoot architecture for the ultimate in foot sensation. Ventilated side pieces for maximum air flow and comfort. Receptor technology for maximum comfort and stability.