The Cloudracer’s rubber springs are no gimmick. Though the Swiss-engineered shoe sports a thin, almost minimalist mid-sole, the rubber pads compress on each impact, so it takes almost all the sting out of the road while still feeling fast and low to the ground.
“I didn’t know what to make of this shoe at first, but I’m sold,” said one tester. The swap of rubber springs for foam cushioning should also boost the life span, and hot-weather runners will love the extremely breathable, all-mesh upper.
The bottom line: A tempo-run tool for the fleet of foot, but pronators and heel strikers should steer clear. 7 oz; 5 mm drop
$130, on-running.com