Feel progress every time you lace up the Women's adidas 4DFWD. It features a 3D printed midsole technology that is designed to propel you forward as the midsole compresses and then pushes off. Typically when a foot impacts the ground, it applies braking forces. The 4DFWD midsole reduces these forces by redirecting the impact into forward motion. With every step, the adidas 4DFWD compresses forward, providing a smooth transition and a unique running experience. Plus it looks really good! We recommend sizing down 1/2 size with this style. Specs: 4D Midsole 3D Printed Midsole