"The Superfly has a Dynamic Fit Collar designed for locked-down comfort at full speed. The purpose is to make the foot and ankle feel like one body part, rather than conventional boot design which stops at the ankle. The continual transition from foot to ankle ensures you don’t disrupt your body’s natural movements."
Through player feedback, Nike discovered that that the Dynamic Fit Collar not only provided a more locked-down fit, but that players also felt more confident and more aware of their movements.
To provide additional strength and lock-down for multi-directional movement, designers added Brio cables. These cables are knitted directly into the one-piece upper and lock the eyelet into the outsole, creating strength similar to a suspension bridge.
"The Mercurial Superfly is for explosive speed and is Nike's fastest boot in the game for the game's fastest players like Cristiano Ronaldo, Franck Ribéry and Zlatan Ibrahimovic who explosively accelerate, cut and move in multiple directions while controlling the ball. For that type of player, Nike has returned to its Vapor Traction System for superior grip in all directions."
"A highly-responsive carbon-fibre soleplate, designed for explosive speed in all directions, incorporates a Supernatural Motion Plate Chassis for rotational toe-off traction and lateral heel studs for support."
The mercurial plate and studs have been engineered for explosive speed with a new full-length carbon plate, using two layers rather than three for a more flexible plate that will help players efficiently and effectively transmit more power to the ground. The carbon fibre plate is also lower to the ground, which lowers the player’s centre of gravity for enhanced traction.
The Mercurial’s blades have been redesigned and reconfigured with added studs at the heel for more stability, and at the toe for increased traction that’s more anatomically aligned.
"For consistent contact and increased control at full speed, the Superfly features a Micro-Textured Flyknit upper with NIKESKIN for barefoot feel."
"Flyknit is a material and method of manufacturing that allows us to design footwear that revolutionizes fit, creating a sock-like feel against the foot,” said Phil McCartney, VP of Sport Performance Footwear. “We’re building on Flyknit’s game-changing potential and adapting it specifically to football. The second-skin nature of Nike Flyknit technology places the foot closer to the ball and creates a supernatural fit."
Traditional boot construction methods required additional layers to provide friction for touch, which leads to the foot being further away from the ball. FlyKnit reduces those layers to provide great ball feel in a minimal package.
One of the main considerations when using FlyKnit for a football boot was the weather conditions. Water retention compromises touch and feel. To protect the foot from this happening, Nike’s design team developed a special application called NIKESKIN, which is placed over the top of the Flyknit. The skin itself is no more than 0.1 mm thick — thinner than a sheet of paper — and melts onto the knit to help protect from water, thus providing protection. Added to that, Flyknit yarns don’t absorb water.