Nike Free 4.0

More flexible than the 5.0 and more cushioned than the 3.0, the Nike Free 4.0 Flyknit unleashes your natural stride with a lightweight, supportive upper and highly flexible, low-profile outsole.

Ultralight Support

The Flyknit upper—a 1-piece layer made entirely of polyester yarn—seamlessly integrates areas of stretch and structure, providing ultralight support and a contoured fit.

Exceptional Flexibility

Hexagonal flex grooves are hot-knife-cut into the midsole, wrapping around the sidewall so your foot moves more naturally in every direction. Secondary cuts intersect the flex grooves for even greater flexibility.

Natural Stride

The heel mimics the shape of the foot to promote a more natural footstrike.

More Benefits

• Attached Nike Flyknit tongue with notches gives you easy entry.
• Minimal insole molds to your foot’s curvature for added support and comfort.
• Non-stretch, knit-in heel provides structure and support.
• Asymmetrical lacing helps reduce lace pressure on the top of your foot.
• Waffle outsole lugs help provide cushioning and add responsiveness.