All day, every day. This shoe from On was made to perform; passing any test you throw at it with flying colours. The outsole features the latest incarnation of Zero-Gravity foam for improved performance and even softer CloudTec® landings. A new Speedboard™ within converts energy into forward motion. The signature speed-lacing system and molded heel design let your foot slip in and out with ease, yet hold it safely in place on the move.