More flexible than the 5.0 and more cushioned than the 3.0, the Nike Free 4.0 Flyknit Men's Running Shoe unleashes your natural stride with a lightweight, supportive Flyknit upper and a highly flexible, low-profile outsole.
The Flyknit upper—a one-piece layer made entirely of polyester yarn—seamlessly integrates areas of stretch and structure, providing ultralight support and a contoured fit. Knit-in Flywire cables cradle the midfoot for enhanced support where you need it most.
New hexagonal flex grooves are hot-knife cut into the outsole and wrap around the sidewall so your foot moves more naturally in every direction. Secondary cuts intersect the flex grooves, adding even more flexibility.
The heel mimics the shape of the foot, rolling with the ground to promote a more natural footstrike.
With a 6mm difference between heel and forefoot height, the Nike Free 4.0 Flyknit gets you closer to the ground for a more natural feel while still offering a great blend of cushioning and support.
Attached Nike Flyknit tongue with notches for easy entry
Minimal sockliner molds to your foot's curvature for added support and comfort
Non-stretch, knit-in heel for structure and support
Asymmetrical lacing for reduced lace pressure on the top of your foot
Waffle outsole lugs help absorb impact and add responsiveness
Weight: 8.4 ounces (men's size 10)