with just the right amount of support
Castelli's exclusive fabric with a hydrophilic electrospun microporous polyurethane membrane
The SUB10 model is a nod to Ironman finishers who have achieved the feat of finishing in under 10 hours
Excellent bottle retention
while conforming more naturally to the contours of your head
cloudstratus 3 m on running Size:42 with just the right amountDiscover the On Running Cloudstratus 3 M, a flagship performance shoe! Weighing just 290g and featuring a Double CloudTec midsole for superior cushioning, the updated Speedboard technology, and a Helion superfoam midsole, you'll experience powerful forward roll and ultra soft landings. For added stability, grip, and comfort, the redesigned collar and tongue, along with the stretchy heel lining, provide enhanced support.