ASICS Jolt 4 PS Juniors Running Shoes Inspired by the GT running series, the JOLT 4 PS (Pre-School) shoe is a multi-functional style that's engineered for everyday use. Engineered Mesh Upper The Jolt 4 PS upper is constructed of an engineered mesh material that encases each foot in breathable comfort. The mesh works incredibly hard to allow air to fully permeate the entire upper, providing you with a constant supply of fresh, cool air while simultaneously forcing out hot, muggy air. The mesh is also extremely comfortable next to the foot decreasing distractions and irritation. Additionally, the upper offers synthetic overlays that wrap around the foot for increased comfort and support. The overlays work to conform around the foot and provide better and more structural integrity. The synthetic overlays further work alongside an internal heel counter that works incredibly hard to provide a locked-in fit. This innovative technology prevents in-shoe slipping which in turn prevents ho.