synthetic-and-rubber Imported Rubber sole BOOST midsole Fitcounter molded heel counter Any time you're on your feet is a good time to wear these adidas Ultraboost shoes. Equipped with all the performance technology that runners love, they're updated with extra flair - just look at those metallic details. Energy-returning BOOST in the midsole and a foot-hugging adidas PRIMEKNIT upper make sure of it. 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.