Nike Gripknit is a sticky material that provides better touch to the ball. It takes up most of the upper, including the first 2 laces, covering the most common strike zones of the foot. It molds to the shape of your foot and gives you equal grip in wet or dry conditions. Asymmetry in the collar and heel provides comfort. Soft elements in the heel make for an easy break-in process and help reduce irritation and pressure without compromising stability and structure. Tri-star studs work with forefoot flex grooves to provide optimal traction and help unlock change of direction. See the lines on the outsole? They match your typical on-field movements, which push forward then zigzag before a strike.