The adidas Y-3 Runner 4D IO Triple Black showcases a sleek finish on a versatile runner that comes with detachable details. Wearers can opt for a Primeknit sock or a more conventional sockliner and removable tongue. A black mesh overlay envelops the upper and extends to the groundbreaking 3D-printed midsole, crafted from a blend of light, oxygen and liquid resin. Lattice-like sidewalls are exposed through cutaway detailing around the forefoot.