The mid-rise Flyknit upper is designed to act like a natural extension of your leg, leaving only the fantastic sensation of cushioning underfoot. The near-seamless, one-piece construction is knit more openly in areas where your foot and ankle need greater stretch and breathability, and tighter in areas that demand more strength and support. Flywire integrates with the laces for a dynamic, supportive fit Skin-like overlay on the heel for added structure Fused foam midsole for enhanced durability without the use of glues or cements