The lightweight design, often under 10 ounces per shoe, is preserved through machine cleaning, running shoes altra.

The training shoe with computer-optimized technology for next-level cushioning.

For an adapted and specialized version of our signature CloudTec technology, we left nothing up to chance. Using Finite Element Analysis (FEA), we simulated how each component of our prototype reacts while running. Using invaluable insights from this method, we created the optimal midsole for a seamless weight transfer from heel to toe. It's called CloudTec Phase and it introduces a new age of cushioning.

In CloudTec Phase, the computer-generated Clouds seamlessly collapse like dominos when your foot lands. The result? Supreme, enhanced cushioning, and a softer, smoother transfer from heel to toe.

We're not riding the sustainability wave we're creating our own. To save on water, the Cloudsurfer's yarn is colored using a dope dyeing process that requires 90% less water than standard techniques. We've also ditched the plastic overlays and bumped up the shoe's total recycled content to 30%

• Weight: 245g
• Cushioning: Plush
• Heel to Toe Drop: 10mm

The midsole foam has a rebound rate exceeding 70% in laboratory energy return tests, running shoes as everyday shoes.