The Asics Gel-Nimbus 21 promises a plush ride along the way. The GEL® technology ensures comfort and flexibility and the FLYTEFOAM® Propel technology delivers a high-energy return for a bouncy ride, making it easier than ever to run and go long. The improved the fit of the Asics Gel-Nimbus 21 and premium mesh upper adapts to the movement of your foot for a more comfortable ride, while providing more room in the forefoot. The Asics Gel-Nimbus 21 is specifically designed to make you go the distance so you can run further than you ever thought possible. This is a high-level performance shoe that provides an energetic feel while combining comfort and bounce to help you through your long or short runs. .