Cloudultra Pro

Reviewers widely agree that the On Cloudultra Pro is a strong contender in the trail super shoe category, particularly excelling in ultra-distance events. It offers a highly comfortable and stable ride, even over many hours on the trails, despite its generous cushioning and high stack height. While it may look clunky, it runs surprisingly nimble and efficient. Reviewers highlight its premium materials and excellent build quality, positioning it as an outstanding choice for long-distance runners who prioritize comfort and stability.

Strengths

• An amazing option for ultra-distance races and very long-distance running

• Offers a high level of comfort, accommodating swollen and wide feet for multi-hour runs

• Stable and controllable despite generous cushioning and high stack height, performing well on technical descents

• Features an energetic and efficient midsole foam, with best-in-class efficiency reported for uphill and downhill runs

• Lightweight for its class

• Boasts premium materials and excellent build quality, including a super strong and abrasion-resistant technical mesh upper (Leno weave)

• A flexible fiberglass plate enhances versatility and contributes to a nimble feel compared to stiffer, fully carbon-plated shoes

• Performs well in cold weather

• Provides a dynamic yet comfortable ride

Drawbacks

• Comes with a very high price tag, making it less appealing to budget-conscious buyers

• Heel strikers may not find its low-drop design appealing

• Toebox durability could be better

• Lacks Vibram Megagrip rubber

• Propulsion, efficiency, and turnover at speed may not feel as strong as some competitors' shoes

• The 3.5mm lugs are not super aggressive, making it less suitable for muddy conditions

• Its high stack height may not work for everyone on highly technical trails

Who It's For

The On Cloudultra Pro is primarily designed for ultra-distance runners and those tackling very long-distance events like UTMB, where long-term comfort and stability are paramount. It suits runners who prioritize a forgiving midsole and a stable, efficient ride over pure, aggressive speed. It's also ideal for individuals who appreciate premium materials, a wide, foot-shaped upper, and are not constrained by a budget.