Women's On Cloudboom Strike Size:6.5 the Altra Rivera 4 features

the Altra Rivera 4 features an updated heel collar that provides more structure for a more secure fit around the heel and ankle

The Continental™ Rubber outsole ensures superior grip in any condition

made from ~90% recycled materials

It has enough cushioning to keep you comfy as an everyday trainer

Women's On Cloudboom Strike Size:6.5 the Altra Rivera 4 featuresBuilt for your fastest half and full marathons, the Cloudboom Strike revolutionizes the racing experience. Ultra responsive Helion HF hyper foam and an innovative drop in midsole which we call a Bounceboard propel you forward with power. Race specific CloudTec Strategically placed CloudTec elements create a faster, smoother roll through, while the ultra cushioned ride protects against impact. The result? Increased running efficiency. Cushioned