Fast training, road running, racing, 5K to marathon. When you develop a shoe with elite athletes you never stop making improvements. Meet the  Cloudflow. Featuring a fast-firing Speedboard® and Helion™ superfoam for responsive power and soft landings. Engineered for high speeds and maximum comfort whether you're crushing a 5K or a marathon. The all-new Cloudflow. The shortcut to runner's high.

Specifications

• Heel-toe drop: 9mm
• Weight: 238g
• Ultralight Helion™ superfoam combines a fast, responsive feeling with fully cushioned road protection.
• The Cloudflow gets the same geometry, grip rubber and traction pattern as our elite marathon shoe, the Cloudboom. 
• The heel cap fit is now even more precise, for a reassuringly secure fit even as you take sharp corners. Ideal for intervals around the block or flying around tight city streets at a marathon major.