• On recommends buying your usual size as this model fits true to size
• Fresh from the lab comes On's weirdest creation yet. Say hello to the Cloudmonster with more CloudTec, more cushioning, and more monster of a ride. Featuring On's biggest Clouds ever, it’s Helion engineering combines with our signature Speedboard for explosive take offs, and a radical forefoot rocker that makes you want to keep rolling along even on your longer runs.