The Parley x adiZero Prime Boost sneaker is a marathon training shoe that showcases a carbon and Blue Spirit Primeknit upper. This upper is made from Parley Ocean Plastic™, a innovative material derived from recycled waste. Additionally, this shoe offers the choice between external or internal lacing options for a personalized fit. Its snug design is specifically engineered to enhance racing performance, accompanied by a white Boost midsole and durable Continental rubber outsole.