Bring on the burpees and mountain climbers in the On Cloud X 4! This versatile workout warrior can handle any challenge. Enjoy soft landings on the Helion™ midsole while the Speedboard® adds flexibility for lateral movements. A breathable mesh upper made from recycled polyester provides eco-friendly comfort. From running miles to lifting weights, the On Cloud X 4 helps you max out every workout! In Store Stock ONLY** What's New? Updated Speedboard® design improves forefoot flexibility and underfoot cushioning. Who's it for? Runners who like to switch up their workouts with shoes they can wear on the road and in the gym. Shoe Technology Upper: Thin and breathable mesh upper made using 100% recycled polyester for eco-friendly comfort. A majority of the colorways feature a dope-dyed upper to reduce water usage. Extra heel padding improves comfort while running. Midfoot cage and star lacing system wrap around the foot for a secure hold. Midsole: Helion™ superfoam midsole provides soft underfoot cushioning. X-shaped Speedboard® provides more flexibility during multi-lateral movements. Outsole: Rubber pads provide enhanced grip. CloudTEc® elements add cushioning for soft landings.