Zappos.com is proud to offer the Avia - iShape (White/Chrome Silver/Powder Blue) - Footwear: Join the toning fitness craze that's sweeping the masses and get back to living a healthy lifestyle with these women's iShape walking shoes from Avia. ; Features AVI-Motion Toning Technology - The first biomechanically-correct toning shoe that allows your foot to move naturally. ; Perforated leather upper. ; Padded collar with achilles heel notch for added mobility. ; Textile lining with cushioned footbed for added comfort. ; Negative heel engineering promotes muscle activation. ; Forefoot flex-grooves allow for natural Dorsi flexion. ; Lightweight construction. ; Archrocker - A time tested and APMA approved design that enhances the users rocking motion from heel to toe. ; Shear Cantilever System accelerates the heel area's ability to rebound to its natural state in time for the next heel strike. ; Solid rubber outsole. ; Weight: 11 oz ; Product measurements were taken using size 6. Please note that measurements may vary by size.