Rubber sole Lace closure Stabilizing Torsion System; Runners with heel-to-toe support; Lace closure & Snug fit Stretchweb outsole flexes naturally for an energized ride, and Continental Rubber gives you superior traction The adidas Primeknit upper wraps the foot for targeted support that enhances movement Join the space race. These adidas Ultraboost 20 Shoes were created to celebrate the race to send a civilian to the moon by 2023. The stretchy knit upper has stitched-in reinforcement inspired by aerospace technology. An iridescent midsole gleams like comet dust and provides responsive cushioning.