When you set out for your daily miles in these running shoes, you'll experience energy return like never before. That's because the Ultraboost Light is made with Light BOOST, a new generation of adidas BOOST that's lighter and more responsive than ever. Extra stability comes from the Linear Energy Push system, integrated with the outsole. The foot-hugging adidas PRIMEKNIT upper delivers optimal flex and comfort through every stride. This shoe's upper is made with a high-performance yarn which contains at least 50% Parley Ocean Plastic - reimagined plastic waste, intercepted on remote islands, beaches, coastal communities and shorelines, preventing it from polluting our ocean. The other 50% of the yarn is recycled polyester.