Upper: Recycled polyester and TPU for lightweight durability and breathability Outsole: Rubber with heel and forefoot inserts for solid traction CloudTec® midsole delivers soft, cushioned comfort and a smooth ride No Speedboard® construction allows greater flexibility and natural movement Slip-on bootie inner with pull tabs for easy on and off Engineered mesh upper provides a performance-inspired running feel Iconic quarter panel adds structure, support, and signature style Grey and Red colorway brings a modern athletic edge The On Running Cloudswift Amp in Grey and Red redefines effortless comfort with its flexible design and signature CloudTec® cushioning. Adapted from the Cloudswift 4, it combines the same responsive performance with a softer, smoother feel—perfect for all-day wear, workouts, or urban adventures. Product code: 3MG10463377