Overview The Cloudflow is On's tempo shoe — built for the day that isn't easy and isn't race day. The Cloudflow 5 upgrades to Helion HF on top of a glass-fibre-reinforced Speedboard, with a pronounced forefoot rocker; reviewers call it firm and resilient, best the faster you run. The Cloudflow 4 keeps a lighter Helion platform and is the more forgiving of the two at slower paces. Cloudflow 5, Helion HF top layer on an 8% glass-fibre-infused nylon Speedboard, pronounced forefoot rocker. More propulsive at tempo than the Cloudflow 4, ~278 g M9. Details Best for: Tempo runs, fartlek workouts, progression long runsHalf-marathon and marathon pace trainingRunners who want a non-carbon workout shoeThe rotation slot between daily trainer and super shoe Specs: Drop: 6 mmWeight: ~278 g (men's US 9) Colourways: Alloy / Rock, White / Lime, Arctic / Stone Sizing: 7 / 7.5 / 8 / 8.5 / 9 / 9.5 / 10 / 10.5 / 11 / 11.5 / 12 Materials & Care Midsole foam: Helion HF hyper-foam (top layer) Plate: Speedboard (nylon with 8% glass-fibre on Cloudflow 5)Outsole: Rubberized CloudTec podsUpper: Engineered mesh with race-style fit Brush off dirt and debris after each run. Remove laces and insoles; hand wash uppers with cold water and mild detergent. Do not machine wash, tumble dry, bleach or dry clean. Air dry away from direct heat; CloudTec pods and Helion foam last longer when the shoe fully dries between uses. Rotate pairs where possible. Do not re-DWR yourself on road models. Bundle & Save Build a bundle and save up to 10% off. Shop Bundle Builder
