Imported Synthetic Rubber sole BOOST midsole Lace closure Linear Energy Push system enhances forefoot and midfoot stiffness to provide you with more responsive stride Adidas PRIMEKNIT textile upper You know how the adidas Ultraboost revolutionised comfort with its responsive BOOST midsole? This version of the iconic shoes has even more of it. More BOOST. More comfort. Find an energy-filled ride while you tackle 10Ks or quick loops in the city. An adidas PRIMEKNIT upper hugs the foot with targeted support, and a Linear Energy Push System increases stiffness to propel you from one step to the next. 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.