adidas Big Kid a3 Artillery Sneaker 100% Leather Rubber sole An adidas exclusive a3 TPU (thermoplastic polyurethane) plate runs the length of the sole, measuring conditions and making dynamic cushioning adjustments accordingly Mesh underlay for increased ventilation Advanced insole cushioning and a comfortable, breezy upper provides strategic keep your foot comfortable and supported A Molded Ethylene Vinyl Acetate sockliner provides flexible, light-weight support Non-marking rubber outsole protects all that newfangled technology and keeps old-fashioned scuff marks off the floorboards