On Cloudmonster 2 Unisex Marathon Running Shoes – Undyed | Flame

On Cloudmonster 2 – Unisex Marathon Running Shoe

The On Cloudmonster 2 is On’s most cushioned and most energy-returning road running shoe — the second generation of the Cloudmonster platform, rebuilt from the ground up with a redesigned CloudTec® Phase midsole architecture, an upgraded Helion™ superfoam formulation, and a more responsive ride profile that retains every gram of the original’s legendary cushioning presence while delivering a more propulsive, more dynamic step. A shoe built for long-distance training and marathon performance, for runners who want maximum cushion without sacrificing ground feel or forward momentum.

Colorway

This style is offered in the Undyed | Flame colourway — the most chromatically aggressive and most visually immediate of the Cloudmonster 2 standard colourways: a five-colour composition in undyed white, hot pink, flame red, black, and green that assembles every colour at or near its maximum saturation and places them in direct, unmodulated adjacency — the colourway as a declaration that maximum cushion and maximum visual energy belong in the same shoe. The upper’s primary body is rendered in undyed white: not the processed optical white of a bleached or bright-dyed textile, but the natural, slightly warm white of an unfinished knit left in its base state, the white that the yarn produces when no pigment is added — clean and neutral as a ground for the four saturated accent registers that define the composition. Against this undyed ground, a wide diagonal stripe runs the full lateral lower upper in a vivid hot pink — a fully saturated magenta-leaning pink in the register of neon fuchsia at its most immediate, a pink that operates at the boundary between warm red and cool magenta and reads as the most chromatic and most attention-demanding pink a textile can carry. The stripe’s hot-pink ground is framed by a thin black border that separates it cleanly from the undyed upper above, the black frame sharpening the stripe’s chromatic presence and preventing the pink from bleeding into the white. The ON RUNNING wordmark is woven into the pink stripe in a slightly lighter pink, the text tonal within the hot-pink field and readable at close range. A large near-black On circular logo anchors the lateral midfoot above the stripe: a deep charcoal-black circle in maximum contrast against the undyed white upper, the logo’s dark mass as the composition’s tonal anchor in the upper’s lightest zone. A large flame-red panel — a fully saturated signal red, the red of emergency flares, of starting-line tape, of the warmest red before it becomes orange — covers the entire lateral and medial rear upper from the lower heel to the collar junction, the red panel as the composition’s second chromatic mass, occupying the full rear quarter of the shoe in a vivid, flat red field that meets the undyed white at the shoe’s lateral mid-section in a clean, hard-edged boundary. The flame-red panel continues up to frame the rear of the black collar: the collar in pure black against the flame-red rear, the black and red in direct adjacency at the shoe’s entry point, the two darkest and most saturated elements of the composition in contact at the crown. The lacing system introduces the composition’s fifth chromatic register: a mixed-fibre rope lace in black, white, and green — a vivid, fully saturated emerald-to-mint green threaded into the black-and-white braid, the green visible at the individual fibre level and as a tonal cast across the lace’s full length. The green lace’s aglets and the lace-loop hardware carry the same green, the colour declared at the shoe’s lacing hardware as well as in the textile. A warm off-white Cloudmonster 2 midsole — the square-aperture CloudTec® Phase pods in bright white — extends cleanly below. A flame-red outsole grounds the composition at contact point in the same signal-red register as the rear upper panel, the red at the base echoing the red at the rear, the composition’s most saturated chromatic element present at both ends of the shoe’s vertical axis. Undyed above. Hot pink at the stripe. Flame red at the rear and outsole. Black at the logo and collar. Green in the laces. The five colours at five distinct positions across the shoe’s full surface, each at or near its maximum saturation, the entire composition as an uncompromised chromatic declaration.

Key Features

• Hot-Pink ON RUNNING Stripe with Black Border – Fully saturated magenta-pink diagonal stripe with thin black frame and tonal ON RUNNING wordmark — the composition’s most chromatically immediate element, a pink at the boundary of neon fuchsia against the undyed white upper
• Flame-Red Rear Panel and Outsole – Signal-red rear upper panel covering the full lateral and medial heel zone, with matching flame-red outsole — the composition’s largest chromatic mass, the most saturated red at both the rear upper and the ground contact
• Black Near-Charcoal On Logo and Collar – Deep charcoal-black On circular logo at maximum contrast on the undyed upper, with pure black collar framing the red rear panel — the composition’s tonal anchors at the midfoot and entry point
• Green-Threaded Mixed-Fibre Rope Laces – Black-white-green braided rope laces with green aglets and lace hardware — the composition’s fifth colour register, a vivid emerald-to-mint green threaded into the lacing system at fibre level
• Undyed White Base Upper – Natural unprocessed white knit upper in its base-yarn state — not optical white but the warm, unfinished white of undyed textile, the most neutral and most chromatic ground for the four saturated accent registers
• Redesigned CloudTec® Phase Midsole – Second-generation square-aperture cloud pods — more responsive, more phase-connected, and more propulsive than the original Cloudmonster while retaining maximum cushioning volume
• Helion™ Superfoam – On’s proprietary high-rebound foam formulation — lightweight, temperature-stable, and energy-returning across long-distance training loads

Product Details

• Brand: On Running
• Model: Cloudmonster 2
• Gender: Unisex
• Use: Road running, marathon training, long-distance performance
• Closure: Lace-up
• Upper Material: Undyed white engineered mesh with hot-pink ON RUNNING diagonal stripe, flame-red rear panel, black On logo and collar, green-threaded rope laces
• Midsole: Helion™ superfoam with CloudTec® Phase square-aperture pods in white
• Outsole: Rubber in flame red

Size Guide

Please refer to the size chart before ordering. If you are between sizes or prefer a roomier fit, we recommend choosing the larger size.

Please select all required options before checkout. Colors may vary slightly depending on screen settings — please refer to product images for accurate representation.