The Nike Jr. Mercurial Superfly V CR7 Dynamic Fit Younger/Older Kids'Firm-Ground Football Boot features a Dynamic Fit collar and an innovative stud pattern for stability and speed on short-grass pitches. DYNAMIC FIT COLLAR The Dynamic Fit collar fits anatomically around your ankle for a sock-like sensation. NIKE GRIP SYSTEM The internal Nike Grip System helps keep your foot from slipping inside the boot. 3D SPEED PLATE The re-engineered, ultralight 3D Speed Plate fits your foot naturally for explosive speed. Precision-placed studs enable quick starts and stops. ACC TECHNOLOGY All Conditions Control (ACC) technology gives you precision control in wet and dry conditions. NIKESKIN TECHNOLOGY A thin overlay binds plastic film to lightweight mesh to deliver locked-down lateral stability.