On Cloudflow 5

RunRepeat's Carlos Sánchez delivers a measured, somewhat disappointed take on the On Cloudflow 5, praising its premium build, secure lockdown, durable upper, and agile rocker while criticizing its heavy weight, very firm ride, poor energy return (46.9%), and limited breathability. He highlights detailed lab metrics—stack (32.8 mm heel, 28.7 mm forefoot), Shore A durometer readings (48.3 and 51.5 HA), stiffness (20.7N bend), grip (0.52 wet), and weight (271 g)—to show the shoe suits runners who like controlled, stable, low-to-the-ground tempo shoes but will frustrate those seeking bounce, lightness, or summer ventilation. Sánchez recommends it mainly for On loyalists and firm-foam fans, noting better, lighter tempo alternatives at similar or lower prices, and ultimately questions its value given the trade-offs.

Running Shoes Guru’s Olivia Yoder praises the Cloudflow 5 as a lively, tempo-focused trainer that excels at speed work and delivers notable energy return thanks to Helion HF foam, a nylon-blended Speedboard, and rocker geometry. She notes the shoe feels firm and narrow out of the box—unsuitable for wide or high-volume feet—and that it took several runs to reveal its strengths; once dialed in, the Cloudflow 5 shines on tempo runs, intervals, and varied surfaces, with excellent breathability and fast-drying engineered mesh and targeted rubber pads for traction. Yoder emphasizes it’s a performance piece rather than an everyday cushioned trainer, recommends it for runners who rotate shoes and chase speed, and cautions that its firmness, fit, and price make it a specialist pick rather than a universal buy.

RoadTrailRun’s Sam Winebaum presents Peter Stuart and Courtney Kelly’s take on the On Cloudflow 5 as a stylish, well-built uptempo trainer that truly shines at tempo and half‑marathon goal paces but feels overly firm and a touch heavy for short, fast intervals or long efforts. They praise the breathable, attractive upper, secure lockdown options, excellent traction, and a propulsive ride when pushed, crediting the Helion HF layer and glass‑fiber Speedboard for snap. However, both testers note the HF foam is thinner than it appears, producing a rigid underfoot that drags at slower paces, can feel punishing on longer runs, and may not suit lighter runners for maximal rebound. Comparisons to the Brooks, adidas, Saucony and Hoka lines highlight the Cloudflow 5’s niche: a fast‑feeling, confidence‑inspiring tempo shoe with clear tradeoffs in softness, weight, and versatility.

Jeff Ruane from RunToTheFinish praises the On Cloudflow 5 as a crisp, snappy tempo trainer that delivers a propulsive, fast ride ideal for intervals and tempo sessions. He’s enthusiastic about the redesigned upper, new rocker geometry, glass-fiber/nylon Speedboard, and Helion HF foam, which together create a firm, responsive feel with excellent road connection and a smooth roll—especially for efficient or forefoot strikers. He notes standout positives like secure heel lockdown, grippy outsole, and a sleek, performance-minded fit, but voices clear caveats: the shoe is narrow, quite firm (fatiguing on runs longer than ~60 minutes), not suited to wider feet or heavier runners, and not the lightest tempo trainer at 9.8 oz. Overall the tone is upbeat and impressed, recommending the Cloudflow 5 enthusiastically for speedwork while cautioning it’s a specialized choice rather than an everyday cruiser.

RTINGS praises the On Cloudflow 5 as a data-driven, middling racing shoe that delivers solid cushioning and stability but falls short on overall racing oomph. The reviewers—David Marquez, David Kroeker-Maus, and Yannick Khong—report thorough lab and real-world testing, highlighting a 269 g weight, a high stack (38.9/33.2 mm), good lateral stability (7.6), and respectable cushioning (6.7). Energy-return numbers are uneven: forefoot return (66.9%) outperforms the heel (60.2%), but the publication’s composite “energy return” and 5K/10K racing scores are modest (1.3 and 5.9 respectively), producing an overall verdict of 6.0. The tone is measured rather than enthusiastic—methodical, transparent, and practical—emphasizing objective metrics over hype; the review’s chief insight is that Cloudflow 5 is a stable, well-cushioned daily racer with quantified strengths and limitations, useful for buyers who prioritize data-driven comparisons rather than exuberant endorsements.

Ann Kaewangchai praises the On Cloudflow 5 as an impressively light, responsive daily trainer that excels for shorter runs, recovery sessions, and race-pace efforts. The reviewer expresses clear enthusiasm for the shoe’s updated speedboard, Helion HF foam midsole, and CloudTec cushioning, describing a plush yet propulsive ride and a snug, glove-like fit once broken in. Criticisms are mild and measured: a changed upper material needs a bit longer to break in, and the cushioning may feel a touch too soft for those seeking more substantial support on longer distances. Unique insights include the reviewer’s midfoot-strike perspective and the observation that the Cloudflow 5 feels “lighter than air,” which strongly influences shoe preferences. Overall the tone is upbeat and approving, recommending the shoe for neutral runners who prioritize lightness and responsiveness.

Alastair Dixon assesses the On Cloudflow 5 as a stylish, purpose-built tempo shoe that excites on design and fit but disappoints where cushioning matters most. He praises the roomy, secure upper, effective heel lockdown, aggressive toe spring, rocker geometry and snappy nylon Speedboard—qualities that make it efficient at threshold and faster workouts. However, he criticizes the Helion HF foam for feeling thin and unresponsive, producing a firm ride that falters at slower paces and recovery runs; traction is good but exposed outsole foam could wear quickly. Weight and price are also flagged versus lighter tempo alternatives. Overall, Dixon positions the Cloudflow 5 as a solid, narrowly focused tempo/race-adjacent option for runners who like a firm, mechanical push—valuable in a rotation but not a versatile daily trainer.