BOOST midsole Imported Lace closure From everyday errands to exploring the city, these adidas Ultraboost shoes bring undefeated comfort. The adidas PRIMEKNIT upper is designed to hug your feet for all-day support. The BOOST midsole feels like you're walking on clouds. Your go-to shoes for everyday action. 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.