"The newest generation of the On Cloudflyer, provides the same plush cushioning in a more stable package thanks to the dual-density CloudTec zero gravity foam in the heel, and Helion superfoam in the forefoot. In order to reduce overpronation, firmer elements on the medial side help to stabilize the foot and minimize inward movement. Meanwhile, the stiffer Speedboard promotes a quicker heel-to-toe transfer that helps get the runner through their pronated phase. The shoe is finished off with a new mesh upper that optimizes airflow without losing its foot-hugging fit. Overall, the On Cloudflyer 4 provides runners with a luxurious feel with a hint of support for the miles ahead."