The Futurecraft 4D, a collaborative sneaker released under the 'Aspen' line, builds on the design concept of the UltraBoost Mid from 2016. This limited edition mid-cut shoe showcases an updated version of the Futurecraft technology. With only 800 pairs available, the Primeknit upper features intricate criss-cross stitching on the heel, adding a touch of sophistication to the design. The highlight of this shoe is the Aero Green 4D Futurecraft midsole, which offers targeted cushioning in key areas for optimal comfort.