Women's On Cloudboom Running Shoe

Women's On Cloudboom Running Shoe


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Item No. 37.99639
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The lightweight, carbon-fiber-infused shoe engineered for fast marathons and road races.

The Cloudboom features a new carbon-fiber infused Speedboard for serious explosivity and speed. And for the first time ever, we created a twin layer of CloudTec in Helion superfoam. One above the Speedboard and one below, delivering a unique, adaptive fit underfoot. A single layer of ultralight engineered mesh keeps weight and temperature down. Reinforced sections at the forefoot add the stability needed to handle sharp turns on asphalt. Team this with a new traction pattern on the sole and you�re ready to crush city courses, even in wet conditions. We worked with athletes to Swiss-engineer the ultimate shoe for marathons and road races. It�s ultralight, but powerful. It�s agile enough to handle sharp turns, but without compromise to cushioning. It�s everything you need for your fastest marathon ever. This is the sound of unstoppable. Boom.

Best For:

  • Surface: Road, Gyms, Flats
  • Category: Road Racing � Very lightweight, and offering more cushioning than track and cross country racers, road racing shoes are designed for events ranging from a road mile all the way to the marathon.

Benefits Include:

    Powered by Carbon
  • Optimized for Agility
  • The Sound of Unstoppable
  • Fits true to size.


  • Weight: 6.53oz
  • Heel-to-Toe Offset: 9mm
  • Cushion Level: Moderate Cushion
  • Pronation Support Level: Neutral
  • Style: 37.99639