The adidas Ultra Boost 4.0 Tech Ink is a unique addition to the adidas Ultra Boost line. The Ultra Boost 4 Tech Ink features a Boost midsole that is designed to provide superior cushioning and stability. The technology allows for excellent energy return, which helps reduce leg fatigue while walking and exercising. The shoe has a Tech Ink colorway with Cloud White accents on the sole and nubuck leather 3-Stripes. The shoe is designed with a Continental rubber outsole, which provides excellent grip and traction on both wet and dry surfaces. The outer layer of the shoe is made with a PrimeKnit material that provides maximum support, breathability, and flexibility. This material is created by fusing yarn together to create a seamless upper, delivering a snug and comfortable fit for the wearer. The shoe was released on July 27th, 2018, at a retail price of $180.