On Men's Cloudsurfer Next Altra they have increased the stack

they have increased the stack height and added a new premium foam midsole to deliver that soft

Foam Wave: A Wave of comfort made of 2 layers of foam

Inseam: 29

Upgraded with more PWRRUN cushioning and new plush PWRRUN+ sockliner

On Men's Cloudsurfer Next Altra they have increased the stackRun smooth. Feel faster. The Cloudsurfer Next adds forward roll to soft CloudTec Phase. So every run feels effortless. The Cloudsurfer Next's updated forefoot rocker pushes power to the front. Built for daily running, it's light, cushioned and responsive. And feels fast too. Combined with Cloudsurfer cushioning for an effortless feeling, put simply, it makes faster running feel easier. Modeled after On's top race day shoes, the updated Cloudsurfer