On Cloudboom Max

Built for: Daily training and tempo days — especially if you land on your heel.

The Cloudboom Max is On's stable super trainer. Two layers of Helion HF — a PEBA-based top over a TPEE base — sit around a fiberglass plate rather than a carbon one, with visible cutouts that let it bend through the midfoot and forefoot instead of locking rigid. The result is one of the most stable tall shoes on the market: maximum heel-counter stiffness, and a platform reviewers describe as stable as a table.

Why it works

• Dual-layer Helion HF — PEBA-based on top, TPEE-based beneath.
• Fiberglass plate with cutouts, so it flexes through midfoot and forefoot rather than forcing one pace.
• Exceptional stability: 5/5 heel counter stiffness, well suited to heel strikers.
• Durable outsole rubber — just 0.7 mm of wear in lab abrasion testing.

Specs at a glance

• Surface: Road, treadmill, paved paths
• Best for: Daily training, long runs and tempo
• Drop: 8 mm (On stated) — 39.2 mm heel / 30.0 mm forefoot, lab measured
• Weight: ~10.1 oz / 286 g (men's US 9)
• Ride: Tall, cushioned and unusually stable for the stack height

Colorway

A clean execution of the Cloudboom Max, with the fiberglass plate visible through the Helion HF midsole along the sidewall.

Free US shipping, tracked door to door. Questions before you order? We reply within 24 hours.