Nike Mercurial Victory VI Dynamic Fit Astroturf Trainers - Laser Orange/Black/White/Volt - Kids SPEED REDEFINED. The Nike Mercurial Victory VI Dynamic Fit Astroturf Trainer combines a tongueless upper with embossed ridges to provide the fit, touch and traction needed for today's fast-paced game. Details : • Dynamic Fit collar links the foot, ankle and lower leg. • Embossed horizontal ridges enhance touch. • Tongueless construction wraps the foot for a snug fit. • Rubber compound is developed for traction on artificial-turf surfaces.