Nike Women's ZoomX Invincible Run FK 2 Run Shoes Teal/Pink Size 8 B Medium USSecure Cushioned Comfortable 3 Flyknit components were placed in different areas of the shoe. At the tongue seamless engineering has created soft padding and an adjustable fit. The vamp is soft with a highly secure fit. And finally the heel is built with a clip for containment and cushioning. The result is an upper that keeps your foot feeling comfortable and stable while you pound the pavement Higher