Rubber sole BOOST midsole Continental Rubber outsole Lace closure Regular fit Too good to confine to the track. With their understated color palette, these adidas Ultraboost running shoes look just as good with jeans as running shorts. A breathable adidas PRIMEKNIT upper wraps the foot in place, while BOOST cushioning gives you incredible energy return. The Stretchweb outsole supports your natural stride. Made from Continental Rubber, it stays gripped on all terrain. 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.