These shoes were created using motion capture technology to meet the needs of the female runner. A women's-specific arch offers a uniquely supportive feel. The stretchy knit upper adapts to the changing shape of your foot as you run, and responsive cushioning delivers a smooth and energized ride. Women's Specific Fit Lace Closure [Locked-In Feel] adidas Primeknit Textile Upper [Lightweight + Breathable] Flexible Stretchweb Outsole; Continental™ Rubber Outsole [Extraordinary Traction in Wet + Dry Conditions] Responsive Boost Midsole [Supportive + Stable Comfort] Lightweight + Adaptive Shoes Great condition