Nike Jr. Mercurial Superfly 8 Academy CR7 TF Little/Big Kids' Turf Soccer Shoes STAY FAST AND SPARK POSITIVITY. As an unstoppable force on the field, Cristiano Ronaldo attributes his expertise to his positive mindset. The Nike Jr. Mercurial Superfly 8 Academy CR7 TF has a repeating bolt pattern that lets you bring your own spark of positivity to the field. Synthetic material in the upper is textured for better grip and touch. Dynamic Fit collar wraps your ankle for a sock-like fit that's made to move with you. Rubber sole is designed for explosive traction on artificial turf. More Details For use on shorter, synthetic surfaces Cushioned insole