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The Cloudflow 5 is On's tempo trainer, sitting between a daily shoe and a carbon-plated racer. It pairs a Helion HF top layer with a nylon Speedboard reinforced with 8% glass fiber and a pronounced forefoot rocker, which makes it feel firm and propulsive the faster you go. At about 278 g in a men's US 9 with a 6 mm drop, it suits runners doing tempo runs, fartleks and marathon-pace work who don't want a carbon plate. Reviewers find it less forgiving at easy paces than the lighter Cloudflow 4, so it works best as a fast-day shoe in a rotation rather than a single do-everything trainer.
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Reviewers describe the Cloudflow 5 as firm and resilient, coming alive at tempo and faster. Many say the Cloudflow 4 is the friendlier choice at slower paces, so the 5 is best kept for workouts.
The Cloudflow 5 is On's tempo running shoe, made for training days that are neither easy nor race day. It has a Helion HF hyper-foam top layer on a Speedboard plate, with a pronounced forefoot rocker. The Speedboard is nylon infused with 8% glass fiber.
The outsole uses rubberized CloudTec pods. The upper is engineered mesh with a race-style fit. It is meant for tempo runs, fartlek workouts, progression long runs and half-marathon and marathon pace training. It suits runners who want a non-carbon workout shoe, and it fits between a daily trainer and a super shoe in a rotation.
