NIKE Air Court Ballistec 4.1 Tennis Shoes leather-and-synthetic Synthetic-Leather Upper - provides lightweight comfort and durability. Outsole Wraps the Upper - On the toe and medial side to provide a radius for a smoother transition at toe off and during slides. Abrasion Resistant Material - On the toe enhances durability in this high wear area. Moulded Synthetic Leather Overlay - enhances durability without sacrificing comfort. Mesh Tongue - Designed to assist ventilation to the foot and allow air to circulate around the shoe