ON Women's Cloudrunner 3 Size:5.5 Flowcool venting on the back

Flowcool venting on the back of the hand allows heat to disperse

the Blackops' watertight construction includes Durafit silicone gaskets

it's still incredibly light and breathable

A mix of speed

100% Merino

ON Women's Cloudrunner 3 Size:5.5 Flowcool venting on the backThe Specs Best for: Running, Road Running Midsole Outsole: A thicker rubber outsole offers durability and traction. Speedboard: The lightweight midsole, made from Helion superfoam, offers stability and impact absorption. It features a new Cloud shape that has been engineered to optimize support. Upper: Engineered mesh for breathability. A plush heel and tongue for next level comfort. And an asymmetrical heel clip that delivers confident, supported