Responsible Collection: Recycled/Repurposed Upper Material: Primeknit (recycled synthetic) Closure: lace Midsole: Light BOOST, Torsion system Sole: Continental Rubber The adidas Ultraboost 5X Shoes energize our runs with lightweight support and adidas' most responsive Boost midsole yet, delivering continuous energy return to keep us moving comfortably from start to finish. The Torsion System stabilizes each step for a smooth, steady stride, while the Continental Rubber outsole offers dependable traction on both wet and dry terrain. Designed in part with recycled materials, these shoes bring an eco-conscious edge to performance, so we can feel good about every mile.