The adidas Futurecraft 4D 'Core Black' is being reintroduced in 2021, showcasing the original colorway that was released in 2018. The upper of the running shoe is made with breathable Primeknit material and features reflective grey three-stripes. The shoe is lined with textile fabric to provide a comfortable, snug fit. The innovative 4D midsole by adidas is lightweight and offers finely tuned cushioning, utilizing 17 years of running data. The midsole is constructed with a lattice structure developed using a combination of light, oxygen, and liquid resin, giving it a unique Linen Green finish.