OVERVIEW

The Cloudultra 3 is On's mileage-first ultra shoe — single-layer Helion HF, aggressive Missiongrip lugs, Leno-weave upper for quick drainage and drying. The Cloudultra Pro is the race-tuned version: same HF philosophy in a lighter, more race-tuned package (269 g M9, 39 mm / 33 mm / 6 mm drop), built for the sharp end of the ultra field. Both share the 6 mm drop and the Leno-weave construction. Cloudultra Pro, On's first true top-tier ultra racer. 39/33 mm, 6 mm drop, 269 g M9. Race-tuned Helion HF, Leno-weave upper, Missiongrip lugs.

DETAILS

Best for:

100-mile and 100-km trail ultras (Cloudultra Pro)

Back-of-pack ultras and high-mileage ultra training (Cloudultra 3)

Wet, technical trail where drainage matters

Runners who want Helion HF on technical terrain

Specs:

Category: Ultra-distance trail (3) / Top-tier ultra racer (Pro)

Stack: 39 mm heel / 33 mm forefoot (lab-measured where available)

Drop: 6 mm

Midsole foam: Helion HF hyper-foam (Pro: dialled race-tuned; v3: single-layer trail-tuned)

Plate: Speedboard (trail-tuned)

Outsole: Missiongrip rubber with aggressive trail lugs

Upper: Leno-weave upper, breathable, quick-drying; abrasion-resistant overlays

Colourway: Ivory / Celeste

Sizing: 7 / 7.5 / 8 / 8.5 / 9

MATERIALS & CARE

Designed in Zurich. Rinse mud off the Missiongrip outsole with cool water; do not scrub the midsole with a brush. Hand wash uppers with mild detergent; Leno-weave uppers drain and dry quickly, air dry away from direct heat. Remove insoles to dry fully. Do not machine wash, tumble dry, bleach or dry clean. On waterproof variants, reproof with a PFC-free DWR (Nikwax, Grangers) when water stops beading.

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