adidas F50 League LL FG/MG KJ3780 Kids' Football Boots. These semi-professional adidas football boots are designed for kids who prefer to play on natural grass. Part of the premiere Lamine Yamal Pack collection, the laceless silhouette perfectly adapts to the anatomical shape of the foot. The Fiberskin upper locks down the foot. Sprintgrid print. The TPU-based Sprintplate 360 outsole, with a combination of bladed and semi-conical studs, is designed for acceleration and agility in all directions on a variety of surfaces. Heel grip.