Nuestra conclusión

Las On Cloudrunner 2 Waterproof nos parecen una buena opción para los corredores que necesitan unas zapatillas que estén listas para el invierno y le pongan al mal tiempo buena cara, pero... no creemos que le vayan a gustar a todo el mundo. En nuestras pruebas, descubrimos que la firmeza de la mediasuela y su diseño pesado pueden no ser adecuados para los que prefieran los pares más ligeros y blandos. De todos modos, su diseño de primera calidad, su excelente estabilidad y su tracción fiable nos dejaron boquiabiertos. Esto hace que sean una opción fantástica para correr y caminar en condiciones climáticas adversas.

Pros

  • Buena amortiguación
  • Con elementos reflectantes para hacerlas más seguras
  • Parte superior impermeable y reforzada
  • Muy buena estabilidad
  • Ideales para inviernos fríos y húmedos
  • Diseño de calidad
  • También sirven como zapatillas para caminar
  • Tracción fiable

Contras

  • Demasiado pesadas
  • El talón es poco duradero
  • Precio superior al de la competencia
  • Mediasuela firme

Veredicto de los usuarios

76
¡Malas!

Who should buy

We tested the On Cloudrunner 2 Waterproof extensively and believe it’s an excellent choice for:

  • Runners who loved the On Cloudrunner 2 but need a winter-ready version for freezing temperatures and wet, unpredictable conditions.
  • Those seeking a mild-stability trainer with a somewhat firm ride that's perfect for cold climates. 
  • Anyone needing a versatile, weather-resistant shoe for running or walking with reliable grip and all-day comfort.

On Cloudrunner 2 Waterproof

Who should NOT buy

We found that the On Cloudrunner 2 Waterproof is heavy; there's simply no way to sugarcoat it. For runners who prioritize lighter shoes, there are much better choices available. Both the Hoka Clifton 9 GTX (for road running) and the Hoka Challenger 7 GTX (for mixed terrain) offer similar versatility while remaining much lighter on your feet.

In our view, the firmer midsole of the Cloudrunner 2 Waterproof also could be an issue. For those seeking a softer ride, the Nike Pegasus 41 GTX stands out. It combines waterproof protection with a ReactX midsole, all at a slightly lower price point than the On.

On Cloudrunner 2 Waterproof parts

Amortiguación

Altura de la suela en la zona del talón

The Cloudrunner 2 Waterproof is a dependable daily trainer, and its 35.8 mm heel stack reflects that perfectly. We believe this height strikes a balanced mix of soft cushioning and everyday practicality, excelling for long runs, casual walks, or even long workdays.

CloudTec at work!

For runners seeking more stack height, On offers the Cloudmonster 2, which features a few extra millimeters in this area. However, there’s no waterproof edition of the Cloudmonster 2 currently available, and the difference in height is barely noticeable.

On Cloudrunner 2 Waterproof Heel stack
Resultados de las pruebas
Cloudrunner 2 Waterproof 35.8 mm
Media 33.9 mm
En comparación con 365 zapatillas de running para asfalto
Número de zapatillas
22.5 mm
Altura de la suela en la zona del talón
46.3 mm

Altura de la suela en el antepié

Our next measurement focused on the forefoot, which we also found comfortably placed in the well-cushioned category at 27.5 mm. For a daily trainer, this strikes a smart balance, avoiding the overly bulky feel of maximalist designs that could hinder everyday use.

On Cloudrunner 2 Waterproof Forefoot stack
Resultados de las pruebas
Cloudrunner 2 Waterproof 27.5 mm
Media 25.3 mm
En comparación con 365 zapatillas de running para asfalto
Número de zapatillas
13.7 mm
Altura de la suela en el antepié
37.1 mm

Drop

We found that while On states this shoe has a 10-mm drop—placing it on the higher end of the spectrum—our measurement revealed 8.3 mm.

This difference delivers a nearly identical feel to a 10-mm offset and keeps the shoe versatile for all footstrikes. Unlike many On models that lean towards a lower drop, this design strikes a balanced profile suitable for everyone.

On Cloudrunner 2 Waterproof Drop
Resultados de las pruebas
Cloudrunner 2 Waterproof 8.3 mm
Media 8.6 mm
En comparación con 365 zapatillas de running para asfalto
Número de zapatillas
0.0 mm
Drop
16.1 mm

Suavidad de la mediasuela

There seems to be a common perception—perhaps due to the CloudTec system—that On running shoes are super plush. In our experience, however, this couldn’t be further from reality, as every On shoe we've tested leans towards a firmer ride, especially when compared to cushioned daily trainers like the New Balance Fresh Foam X 1080 v13 or the ASICS Nimbus 26.

That said, the distinctive "clouds" partially soften the firm Helion foam by collapsing on every stride. Still, the Cloudrunner 2 Waterproof maintains a notably firm underfoot feel—ideal for runners who prefer firmer foams over pillow-like midsoles.

On Cloudrunner 2 Waterproof Helion

And we want to emphasize an essential point about running shoe foams: softer doesn’t mean more cushioned. In fact, firmer midsoles hold their structure better, providing more consistent and reliable cushioning even if they feel less soft.

On Cloudrunner 2 Waterproof Midsole softness
Resultados de las pruebas
Cloudrunner 2 Waterproof 28.1 HA
Media 21.1 HA
Utilizamos la media de cuatro pruebas. La foto muestra una de esas pruebas.
En comparación con 292 zapatillas de running para asfalto
Número de zapatillas
8.5 HA
Suavidad de la mediasuela (de blanda a firme)
38.9 HA

Rigidez de la mediasuela en frío (%)

As a firm running shoe, performing well in cold temperatures was crucial to avoid becoming excessively rigid during winter—the primary use case for the Waterproof edition.

Fortunately, it only became 22.1% firmer, a favorable result. This performance stems from Helion foam’s composition, blending EVA with Olefin Copolymers for enhanced weather resistance.

On Cloudrunner 2 Waterproof Midsole softness in cold (%)
Resultados de las pruebas
Cloudrunner 2 Waterproof 22%
Media 26%
En comparación con 292 zapatillas de running para asfalto
Número de zapatillas
0%
Rigidez de la mediasuela en frío
100%

Grosor de la plantilla

The EVA insole measures an average 4.2 mm in thickness, so let’s proceed to the next test.

On Cloudrunner 2 Waterproof Insole thickness
Resultados de las pruebas
Cloudrunner 2 Waterproof 4.2 mm
Media 4.5 mm
En comparación con 361 zapatillas de running para asfalto
Número de zapatillas
1.5 mm
Grosor de la plantilla
7.3 mm

Rocker

In our view, the moderate stack height and versatility of this model didn’t call for a dramatic rocker shape at all.

On Cloudrunner 2 Waterproof lateral

We believe On reached a similar conclusion, as the Cloudrunner 2 Waterproof features a classic design in both heel and forefoot, with a very subtle curvature.

On Cloudrunner 2 Waterproof Rocker

Tallaje y ajuste

Talla

On Cloudrunner 2 Waterproof son un poquito pequeñas (13 votos).

Si tienes estas zapatillas, ¿qué opinas de su talla?

1 talla más pequeñas ½ talla más pequeñas Tallan bien ½ talla más grandes 1 talla más grandes
En comparación con 302 zapatillas de running para asfalto
Número de zapatillas
½ talla más pequeñas
Tallan un poquito pequeño
Tallan bien
Tallan un poquito grande
½ talla más grandes

Anchura de la parte delantera - zona más ancha

Despite the thicker upper due to the waterproof membrane, we still found the vertical room ample, making the Cloudrunner 2 Waterproof great for individuals with higher-volume feet.

Afterwards, we used our digital caliper to measure the toebox's widest part, recording a spacious 100.3 mm.

On Cloudrunner 2 Waterproof Toebox width - widest part
Resultados de las pruebas
Cloudrunner 2 Waterproof 100.3 mm
Media 98.5 mm
En comparación con 366 zapatillas de running para asfalto
Número de zapatillas
91.6 mm
Anchura de la parte delantera - zona más ancha
104.9 mm

Anchura de la parte delantera - dedo gordo

We discovered that the big toe area features a standard taper while still providing good space, measuring 78.6 mm.

On Cloudrunner 2 Waterproof
That loop is definitely not necessary and adds weight to an already hefty shoe.

Although not an Altra-style design by any means, we believe it's rounded enough to deliver a good fit for most runners with ease.

On Cloudrunner 2 Waterproof Toebox width - big toe
Resultados de las pruebas
Cloudrunner 2 Waterproof 78.6 mm
Media 78.4 mm
En comparación con 240 zapatillas de running para asfalto
Número de zapatillas
67.6 mm
Anchura de la parte delantera - dedo gordo
89.2 mm

Estabilidad

Prueba de estabilidad lateral

We believe that the Cloudrunner 2 Waterproof fits nicely into the mild stability category, comparable to models like the ASICS GT 2000 13 or Hoka Arahi 7. It strikes an interesting balance—wider and stiffer than a daily trainer but less bulky and restrictive than a traditional stability shoe.

Rigidez torsional

One of the most prominent updates in the On Cloudrunner 2 Waterproof is its increased stiffness. In our lab, we measured a 5/5 score—up from 3/5 in the non-waterproof version—making it less ideal for those sensitive to stiffer shoes, but giving a notable stability boost.

Resultados de las pruebas
Cloudrunner 2 Waterproof 5
Media 3.3
En comparación con 344 zapatillas de running para asfalto
Número de zapatillas
1
Rigidez torsional
5

Rigidez del contrafuerte del talón

The heel counter is exceptionally stiff—so rigid that we could barely move it—placing it much closer to a stability shoe than a typical daily trainer. While heel strikers seeking added support might appreciate this design, runners with sensitive heels or Haglund’s deformity may find it uncomfortable.

Resultados de las pruebas
Cloudrunner 2 Waterproof 5
Media 2.9
En comparación con 328 zapatillas de running para asfalto
Número de zapatillas
1
Rigidez del contrafuerte del talón
5

Anchura de la mediasuela - antepié

After completing our manual assessments, we measured the midsole width using digital calipers, starting with the forefoot. At 119.0 mm, it falls on the wider end of the spectrum, contributing significantly to the shoe’s remarkably stable feel.

On Cloudrunner 2 Waterproof Midsole width - forefoot
Resultados de las pruebas
Cloudrunner 2 Waterproof 119.0 mm
Media 114.0 mm
En comparación con 366 zapatillas de running para asfalto
Número de zapatillas
103.3 mm
Anchura de la mediasuela - antepié
126.9 mm

Anchura de la mediasuela - talón

On is known for designing running shoes with narrow heels, such as the Cloudmonster Hyper, but its stability-oriented models like this one break from this trend. Measuring 96.2 mm, this heel width makes it a great option for rearfoot strikers seeking support while keeping their feet warm and dry.

On Cloudrunner 2 Waterproof Midsole width - heel
Resultados de las pruebas
Cloudrunner 2 Waterproof 96.2 mm
Media 90.7 mm
En comparación con 366 zapatillas de running para asfalto
Número de zapatillas
73.0 mm
Anchura de la mediasuela - talón
106.6 mm

Flexibilidad

Rigidez

The waterproof upper introduces additional material, resulting in reduced flexibility. To measure this, we conducted our standard 90-degree bend test and recorded 26.3N.

While still flexible and suitable for daily wear, it’s noticeably stiffer than the 21.1N of the non-waterproof version.

Resultados de las pruebas
Cloudrunner 2 Waterproof 26.3N
Media 28.2N
En comparación con 348 zapatillas de running para asfalto
Número de zapatillas
2.2N
Flexibility <> Stiffness
72.1N

Peso

The most noticeable drawback of the On Cloudrunner 2 Waterproof is its added heft. At 11.4 oz (323g), it’s significantly heavier than the regular On Cloudrunner 2, which weighs just 9.7 oz (275g).

In our view, while it’s understood that waterproof membranes add weight, other Gore-Tex-equipped shoes manage to remain lighter. We tested several comparable models that didn’t tip the scales like this one, reinforcing our belief that weight is the shoe's weakest aspect.

On Cloudrunner 2 Waterproof Weight
Resultados de las pruebas
Cloudrunner 2 Waterproof 11.39 oz (323g)
Media 9.38 oz (266g)
En comparación con 366 zapatillas de running para asfalto
Número de zapatillas
5.61 oz (159g)
Peso
12.59 oz (357g)

Transpirabilidad

After testing hundreds of running shoes we’ve learned that claims of breathability in Gore-Tex shoes often don’t hold up. But let’s just dive in and see what happens.

We began with our smoke test, and the result is crystal clear. This shoe, undoubtedly, ranks among the least breathable models we’ve tested in the lab. The lack of airflow earned it a firm 1 out of 5 score. Rest assured, the machine’s settings were identical to when we tested the Supernova Prima.

Next, we examined the upper of the shoe we cut in half using our light test. The outcome was as expected—no light passed through the dense fabric. This result strongly indicates restricted ventilation, confirming what we already suspected. And for further verification, we turned to our microscope.

On Cloudrunner 2 Waterproof microscope 1

It revealed an ultra-tight, Gore-Tex-like fabric engineered to repel water effectively. However, this impermeable barrier also prevents air and moisture from escaping, trapping heat and reducing comfort when running in hot temperatures.

On Cloudrunner 2 Waterproof microscope 2
On developed its own waterproof upper instead of relying on Gore-Tex.

Despite its ventilation shortcomings, we found the upper to be impressively padded and high-quality. Its 100% recycled materials reflect also a commitment to sustainability, which we genuinely appreciate!

All in all, this upper offers robust protection for harsh weather, but it’s clear that breathability is not part of the equation.

Resultados de las pruebas
Cloudrunner 2 Waterproof 1
Media 3.8
En comparación con 295 zapatillas de running para asfalto
Número de zapatillas
1
Transpirabilidad
5

Durabilidad

Durabilidad de la parte delantera

On asks for a premium on this shoe compared to other daily workhorses, and with that may come an expectation of enhanced durability. In our experience, runners paying more often anticipate a longer-lasting, well-built option.

Our first test focused on the toebox, which we found to perform quite well. After testing, we discovered a solid 3/5 score—a promising start.

On Cloudrunner 2 Waterproof Toebox durability
Resultados de las pruebas
Cloudrunner 2 Waterproof 3
Media 2.5
En comparación con 229 zapatillas de running para asfalto
Número de zapatillas
1
Durabilidad de la parte delantera
5

Durabilidad del acolchado del talón

The heel quickly disappointed us as soon as the Dremel made contact with the lining.

That's a 1/5 score in durability, period. In our view, this is a significant concern for runners prone to heel wear.

On Cloudrunner 2 Waterproof Heel padding durability
Resultados de las pruebas
Cloudrunner 2 Waterproof 1
Media 3.2
En comparación con 225 zapatillas de running para asfalto
Número de zapatillas
1
Durabilidad del acolchado del talón
5

Dureza de la suela

Brands often tweak outsoles for Gore-Tex shoes to optimize wet-surface performance, but On retained the same rubber and pattern from the Cloudrunner 2. In our tests, the outsole clocked 84.5 HC on the Shore C durometer.

On Cloudrunner 2 Waterproof

Is this the right choice? In our view, it depends on your usage. For runners using this shoe year-round—particularly on dry surfaces—it’s a fantastic option.

However, for those in consistently wet environments, the grip and water evacuation may feel slightly underwhelming, though we found the rubber performs decently in those conditions.

On Cloudrunner 2 Waterproof Outsole hardness
Resultados de las pruebas
Cloudrunner 2 Waterproof 84.5 HC
Media 80.1 HC
Utilizamos la media de cuatro pruebas. La foto muestra una de esas pruebas.
En comparación con 346 zapatillas de running para asfalto
Número de zapatillas
60.3 HC
Dureza de la suela
93.0 HC

Durabilidad de la suela

On usually delivers in outsole durability, and the Cloudrunner 2 Waterproof proved no different. After testing with our Dremel, we found only a 0.8 mm dent—a solid result that reinforces the brand’s reputation.

In our view, the durability could be near-limitless when used predominantly on wet surfaces, where reduced abrasion minimizes wear.

On Cloudrunner 2 Waterproof Outsole durability
Resultados de las pruebas
Cloudrunner 2 Waterproof 0.8 mm
Media 1.0 mm
En comparación con 207 zapatillas de running para asfalto
Número de zapatillas
0.0 mm
Desgaste de la suela
2.0 mm

Grosor de la suela

We also measured 3.0 mm of outsole thickness, providing an ample amount of rubber to support its good durability.

On Cloudrunner 2 Waterproof Outsole thickness
Resultados de las pruebas
Cloudrunner 2 Waterproof 3.0 mm
Media 3.2 mm
En comparación con 365 zapatillas de running para asfalto
Número de zapatillas
1.0 mm
Grosor de la suela
6.0 mm

Varios

Precio

On has never been known for offering bargain-priced shoes, and this model is no different. True to the Swiss brand's reputation, you’ll pay a slight premium—but in return, you get exceptional build quality. Whether it’s worth it depends entirely on your priorities.

Resultados de las pruebas
Cloudrunner 2 Waterproof $170
En comparación con 366 zapatillas de running para asfalto
Número de zapatillas
€50
Precio
€310

Elementos reflectantes

The On Cloudrunner 2 Waterproof elevates its already impressive visibility with the addition of a new reflective detail, while retaining the glowing logos from the regular edition that we absolutely loved.

Resultados de las pruebas
Cloudrunner 2 Waterproof

Acolchado de la lengüeta

The tongue padding in this waterproof upper is slightly thinner than its regular counterpart, still measuring a comfortable 8.0 mm. In our view, it still provides a plush feel during runs despite the reduction.

On Cloudrunner 2 Waterproof

We also found that the Cloudrunner 2 Waterproof retains the extra eyelet for tying a runner’s knot. However, for a water-repellent shoe, we believe omitting this feature might better, as it prevents water from potentially seeping through the eyelet.

On Cloudrunner 2 Waterproof Tongue padding
Resultados de las pruebas
Cloudrunner 2 Waterproof 8.0 mm
Media 5.8 mm
En comparación con 363 zapatillas de running para asfalto
Número de zapatillas
0.5 mm
Acolchado de la lengüeta
14.2 mm

Lengüeta: tipo de refuerzo

One notable update from the non-waterproof version is the reinforced tongue, now fully fixed to the sides to block water from getting into the upper. But of course, this change adds some extra weight.

On Cloudrunner 2 Waterproof Tongue: gusset type
Resultados de las pruebas
Cloudrunner 2 Waterproof Ambos lados (completo)

Tirador del talón

The heel mirrors the design of the regular Cloudrunner 2, which means it lacks a heel tab. This came as no surprise to us, given the consistent design choices in this model.

On Cloudrunner 2 Waterproof Heel tab
Resultados de las pruebas
Cloudrunner 2 Waterproof Ninguno

Plantilla extraíble

The footbed of the Cloudrunner 2 Waterproof is removable and, aside from a slight heel flare, has nothing special. Therefore, feel free to replace it if needed.

On Cloudrunner 2 Waterproof Removable insole
Resultados de las pruebas
Cloudrunner 2 Waterproof