On Cloudmonster 2 'Ivory / Silver / Red' Women’s (3ME10122906) — Second-Generation Maximum Cushioning, Women’s-Specific Fit

What Is the On Cloudmonster 2 ‘Ivory / Silver / Red’ Women’s?

The On Cloudmonster 2 ‘Ivory / Silver / Red’ Women’s (Style Code: 3ME10122906) is the second-generation Cloudmonster in a women’s-specific build — On Running’s maximum-cushioning running platform, updated with second-generation Helion™ superfoam for improved high-mileage durability, a lighter and more structured second-generation upper, and last geometry developed specifically for women’s foot anatomy and running biomechanics. Within today’s Cloudmonster family, the Cloudmonster 2 occupies the daily training position: maximum cushioning and improved durability for the runs that accumulate, in a generation-two build that addresses the original Cloudmonster’s durability ceiling without changing the platform’s fundamental character. Ivory / Silver / Red is today’s only three-colour palette — the warmth of ivory against the precision of silver against the energy of red, three colours that occupy entirely different positions on the emotional register and produce a result that is complete rather than competing. At $139, the Cloudmonster 2 is $4 above the Cloudmonster 1 (reflecting the Gen 2 technology) and $30 below the Cloudmonster Hyper (which carries the race-day specification premium). US W7–W11 / EU 38–42.

Quick Facts

• Brand: On Running (Zurich, Switzerland — est. 2010)
• Model: Cloudmonster 2 Women’s — second-generation maximum-cushioning daily training shoe
• Style Code: 3ME10122906
• Colorway: Ivory / Silver / Red — warm ivory upper + silver CloudTec® midsole + red Speedboard® accents
• Gender: Women’s-specific build — narrower heel, wider forefoot, women’s biomechanical last
• CloudTec®: Double-layer, training-tuned — maximum cushioning for women’s load distribution
• Helion™: Second-generation superfoam — improved high-mileage durability; maintains responsive feel
• Speedboard®: Training-calibrated — converts impact energy to forward momentum across all training paces
• Upper: Gen 2 engineered mesh — lighter and more breathable than Cloudmonster 1; improved heel and midfoot structure
• Sizing: US W7–W11 / EU 38–42
• Price: $139
• Category: Road Running / Maximum Cushioning / Women’s / Daily Training
• Fit: Women’s-specific last; true to size

Specs & Technologies

Cloudmonster 2 vs. Cloudmonster 1 — What the Second Generation Improved

The Cloudmonster 2 addresses two specific limitations identified in the Cloudmonster 1 through real-world high-mileage use.

Helion™ Gen 2 — Durability at High Mileage: The original Cloudmonster’s Helion™ superfoam maintained its responsive feel well across early mileage but showed compression set — the gradual reduction in foam thickness and rebound under repeated compression — at higher mileage than On’s training-volume runners accumulate. The Gen 2 formulation addresses this with improved cross-linking in the foam’s polymer structure, increasing the foam’s resistance to compression set while maintaining the energy return coefficient that makes the Cloudmonster feel different from conventional high-stack trainers. The practical result: the Cloudmonster 2 maintains more of its original cushioning feel further into its mileage life than the Cloudmonster 1 did.

Gen 2 Upper — Weight, Breathability, and Midfoot Structure: The Cloudmonster 1’s upper was the original Cloudmonster construction — functional but identified through use as slightly heavier than necessary for a maximum-cushioning daily trainer, and with midfoot structure that was less precise than runners carrying the Cloudmonster’s stack into faster training efforts wanted. The Gen 2 upper is lighter and more breathable through an updated engineered mesh construction, with improved structure specifically at the heel and midfoot — the zones that matter most for fit security during the faster-paced runs within a maximum-cushioning training block.

Women’s-Specific Build — The Biomechanics Behind the Fit

The Cloudmonster 2 Women’s is not the men’s shoe in a different colorway. The last geometry — the three-dimensional shape around which the upper is constructed and which defines the shoe’s internal fit — is developed specifically for the anatomical and biomechanical characteristics of women’s running.

Narrower heel: Women’s feet tend toward a narrower heel relative to forefoot width than men’s feet. A men’s last in a smaller size produces a heel that is proportionally too wide for the average women’s foot, creating heel slip during the propulsion phase of the stride. The women’s last addresses this with a narrower heel cup that holds the foot securely through push-off without requiring the runner to lace compensatingly tight.

Wider forefoot: Women’s feet tend toward a wider forefoot relative to heel width than men’s lasts accommodate at smaller sizes. A women’s-specific forefoot width provides the toe splay room that allows the foot’s natural spread at push-off, which is both more comfortable over distance and more biomechanically efficient for the propulsion phase of the gait cycle.

Q-angle accommodation: Women tend to have a wider pelvis relative to femur length than men, producing a larger Q-angle — the angle between the quadriceps pull vector and the patellar tendon. This larger Q-angle influences the foot’s strike pattern and pronation tendency, producing a gait that the CloudTec® pods’ women’s-specific tuning is calibrated for: load distribution that accounts for the medial bias of women’s typical footstrike rather than assuming the load distribution of men’s gait.

The Cloudmonster Family — Three Versions, Three Purposes

Decision rule: women’s runner wanting maximum cushioning for daily training miles — Cloudmonster 2 Women’s. Men’s runner or women’s runner comfortable in unisex sizing wanting Gen 1 for training — Cloudmonster 1. Race-day or fast-workout performance maximum cushioning — Cloudmonster Hyper.

‘Ivory’ — White Warmed by Time and Material

Ivory takes its name from the material of elephant tusks — the dense, slightly warm off-white of dentine, the calcified tissue that forms the structural core of the tusk. Natural ivory’s colour comes from the specific mineral and organic composition of dentine: calcium phosphate crystals in a collagen matrix, which produces a white that is simultaneously denser and warmer than pure optical white, with a slight yellow-cream undertone that prevents the clinical coldness of maximum-reflectance white. Ivory as a colour name has carried this warmth across centuries of use in design: the white of piano keys, fine porcelain, aged linen, the pages of hand-printed books — materials that are white by nature or by aging, with a depth that pure white cannot achieve because pure white has no history. On the Cloudmonster 2’s engineered mesh upper, Ivory is the white that is serious about its purpose without being severe about its appearance — the white that has been warmed enough to be worn without discomfort, and precise enough to be worn with intention.

‘Silver’ — The Precision Metal

Silver on the Cloudmonster 2’s CloudTec® midsole carries the same precision language it carries on the Cloudmonster Hyper: the cool, directional reflectivity of the metal of instruments that must be exactly right — the mirror, the surgical tool, the electrical contact, the photographic emulsion. Against the Cloudmonster 2’s ivory upper, Silver reads differently than it does against the Cloudmonster Hyper’s more aggressive context: not the silver of a race-day machine at full output, but the silver of the structural engineering that makes the Cloudmonster’s maximum cushioning possible — the midsole architecture visible and intentional against the warmth above it.

‘Red’ — The Colour That Provides What the Others Withhold

Red is the colour with the longest wavelength in the visible spectrum — the first colour that human vision perceives at low light levels, the colour that the human visual system is most sensitive to in terms of attention capture. Red is not a restrained colour. It is the colour of energy, of urgency, of the biological and cultural signals that command attention: the colour of blood, of fire, of stop signs, of warning labels, of the fastest racing liveries, of the accents that performance equipment uses when it wants to communicate that it means business. On the Cloudmonster 2, Red is used as an accent — present in the Speedboard® detailing and lace hardware, the element that provides the energy that Ivory’s warmth and Silver’s precision deliberately withhold. It is not the dominant colour; it is the colour that makes the dominant colours legible by contrast, the note that resolves the palette into something complete rather than something merely considered.

Sizing — Women’s US / EU Conversion Table

The On Cloudmonster 2 Women’s is sold in women’s sizing. True to size for most runners. Half-size up if between sizes or if you prefer more room in the toebox during long runs.

Who Is the On Cloudmonster 2 Women’s ‘Ivory / Silver / Red’ For?

Three profiles: the women’s high-mileage runner who wants On’s maximum-cushioning platform in a women’s-specific build with Gen 2 durability — the Cloudmonster 2’s narrower heel and wider forefoot last accommodate women’s foot anatomy correctly, the Gen 2 Helion™ maintains its cushioning feel further into high mileage than the Gen 1, and the double-layer CloudTec® tuned for women’s load distribution delivers maximum protection at $139; the maximum-cushioning trainer who wants the most protection On offers for daily runs without the race-day premium of the Cloudmonster Hyper ($169) or the Gen 1 platform of the Cloudmonster 1 ($135) — the Cloudmonster 2 at $139 is the current-generation daily training specification at $4 above the original; and the Ivory / Silver / Red palette buyer who wants today’s only three-colour palette in today’s On Running range — the warm off-white of dentine and history, the cool precision of the engineering metal, and the longest-wavelength urgency of red, three colours that occupy entirely different positions on the emotional register and resolve into a palette that is complete: warm, precise, and alive.

Frequently Asked Questions

Q: What is the style code?
A: 3ME10122906.

Q: What is the difference between the Cloudmonster 2 Women’s and the Cloudmonster 1?
A: Three differences: (1) generation — Cloudmonster 2 uses Gen 2 Helion™ with improved high-mileage durability; Cloudmonster 1 uses the original Gen 1 formulation; (2) upper — Cloudmonster 2 has a lighter, more breathable Gen 2 construction with better heel/midfoot structure; (3) build — Cloudmonster 2 Women’s uses a women’s-specific last (narrower heel, wider forefoot, Q-angle-aware pod tuning); Cloudmonster 1 is men’s/unisex. Price difference: $4 ($139 vs $135).

Q: How is the women’s build different from a men’s shoe in a smaller size?
A: Three anatomical differences: (1) narrower heel — prevents the heel slip that occurs when a men’s last at small sizes is proportionally too wide for women’s heel anatomy; (2) wider forefoot — accommodates women’s natural toe splay at push-off; (3) Q-angle-aware CloudTec® tuning — pods calibrated for the medial load distribution of women’s typical gait, not men’s load patterns.

Q: What does Gen 2 Helion™ improve over Gen 1?
A: Durability at high mileage. The Gen 2 formulation uses improved polymer cross-linking to resist compression set — the gradual reduction in foam thickness and rebound under repeated compression — further into the shoe’s mileage life. The energy return feel is maintained; the durability ceiling is raised.

Q: How does the Cloudmonster 2 compare to the Cloudmonster Hyper?
A: Different purposes. Cloudmonster 2 Women’s ($139): daily training, consistent cushioning at all paces, Gen 2 durability for volume. Cloudmonster Hyper ($169): race day and fast workouts, progressive cushioning that activates at race-pace forces, aggressive Speedboard® rocker for propulsion-first toe-off, race-weight upper. Use the Cloudmonster 2 for training miles; use the Hyper for the runs that count.

Q: Is this true to size?
A: True to size for most runners. Half-size up if between sizes or if you prefer more toebox room on long runs.