Selling a pair of ON cloudFlow size 12 wide. They were probably used twice. Perfect new condition Home non smokers not pets. Swiss engineering Cloudtec helion technology. The On Cloudflow 3.0 brings the best of On cushioning together with a revamped upper to create a fast and light shoe. A bed of Helion foam above Onrsquos signature CloudTec outsole absorbs impact upon landing and energizes toe-offs to deliver smooth, fast transitions on the run. The Helion foam works with the Speedboard to create a snappy ride that lasts over quick efforts and marathon-length races.