Nike Jr. Tiempo Legend VII Academy TF Younger Older Kids' Artificial-Turf Football Shoe Boys, Girls, Kids, Black, Size. natural command the nike jr. tiempo legend vii academy younger older kids' artificial-turf football shoe combines lightweight knit material with calf leather for a soft touch and durable comfort when playing on turf pitches. benefits calf leather and synthetic leather for support and a soft touch moulded sockliner for arch support and low-profile cushioning mesh liner inside the toe and midfoot helps preserve the structure of the boot turf (tf) outsole with rubber studs for traction on synthetic surfaces.