Inspired by the original Nike Free, the Nike Aptare continues the revolution of natural motion with soft, adaptable materials that contour to the shape of your foot for all-day, barefoot-like comfort. - Two-layer stretch bootie provides a custom fit for easy on and off - Soft foam around the ankle and slow-recovery foam sockliner - Phylon midsole with flex grooves for flexible, lightweight cushioning - Style Code: 876386 003