W Cloudboom Max

The On Cloudboom Max is a race-day-ready super trainer designed for marathon runners aiming for a solid finish, not just a personal best. Built with maximum cushioning and a glass fiber–infused Speedboard®, this shoe delivers plush comfort and confident propulsion, mile after mile. Its ultralight upper molds to your foot, while CloudTec® and dual-layer Helion™ HF foam absorb impact and bounce you forward, whether you're chasing a sub‑4 or running for the finish line.

Key Features

• Double‑Layer Helion™ HF Foam: High-energy, cushioned midsole tailored for long-distance impact protection and responsiveness. 

• Glass Fiber–Infused Speedboard®: Lightweight dynamism that supports each toe‑off with springy momentum. 

• CloudTec® Cushioning: Soft pods that smooth transitions and lighten each stride. 

• Ultralight, Adaptive Mesh Upper: Breathable and form-fitting for comfort that lasts the full marathon.

• Lightweight Build: ~296 g (~10.4 oz) with a race-legal 8 mm drop (40 mm heel, 32 mm forefoot). 

• Neutral-Rider Stability: Balanced stack geometry designed for marathon distances, offering both cushioning and stability.