Helion™ is On’s proprietary superfoam, developed to bring together comfort, energy return and structural resilience in a single midsole material. Introduced in 2019, it was designed to overcome the compromises typically found in running shoe cushioning systems.

Helion™ is On’s proprietary superfoam, developed to bring together comfort, energy return and structural resilience in a single midsole material. Introduced in 2019, it was designed to overcome the compromises typically found in running shoe cushioning systems.

Traditional foams often force a choice between softness and support, or between responsiveness and long-term durability. Helion™ eliminates that trade-off. Its unique molecular structure combines rigid and flexible elements along the same polymer chains. This allows the foam to compress when cushioning is needed and rebound quickly when energy return is required.

The performance of Helion™ remains stable in a wide range of temperatures. Whether in cold winter mornings or hot summer road sessions, the foam resists hardening or softening, keeping your stride consistent and supported.

In On shoes, Helion™ often works alongside CloudTec® cushioning pods and the Speedboard® plate to form an integrated system. This combination enables soft landings, explosive toe-offs and a smoother overall ride. The foam also maintains its structural integrity over time, reducing compression set and helping shoes last longer both in comfort and performance.

Shoes with Helion™

Right side view of the On Cloud X 4 Fog-Black men’s running shoe #color_fog-black

Men | Training / Gym

Cloud X 4

R 3,349.00

Push your pace and power through circuits in the Cloud X 4, built for dynamic training and short runs on SA streets. With responsive Helion™ foam, a flexible X-shaped Speedboard®, and featherlight breathability from 100% recycled mesh, it's your all-in-one training partner.

Right side view of the On Cloud X4 Ivory-Black women’s running shoe #color_ivory-black

Women | Training / Gym

Cloud X 4

R 3,349.00

From HIIT sessions in the studio to quick loops around the block, the Cloud X 4 delivers lightweight comfort and agile performance. With a sleek, breathable upper and eco-conscious design, it's made for South African women who move with purpose.

Right side view of the On Cloud X 4 AD Wolf-Alloy women’s running shoe #color_wolf-alloy

Women | Training / Gym

Cloud X 4 AD

R 3,349.00

Whether you're smashing circuits or heading to a café meetup, the Cloud X 4 AD combines agile support with breathable style. Built with sustainable materials and performance-ready cushioning, it's the ideal all-rounder for active South African days — gym to street.

Right side view of the On Cloud X 4 AD Stone-Black men’s running shoe #color_stone-black

Men | Training / Gym

Cloud X 4 AD

R 3,349.00

From HIIT in Sandton to casual errands in Stellenbosch, the Cloud X 4 AD delivers light, responsive performance wherever the day takes you. With CloudTec® cushioning, a fork-shaped Speedboard®, and a sleek recycled mesh upper, it's your go-anywhere training and lifestyle hybrid.

Right side view of the On Cloud X Z5 All-Black men’s running shoe #color_all-black

Men | Training / Gym

Cloud X Z5

R 3,799.00

Power through track drills or weight circuits with the On Cloud X Z5 — built for men who demand versatility. With explosive Helion™ cushioning, a responsive Speedboard®, and grippy outsole traction, it's your ultimate tool for high-tempo training and hybrid workouts.

Right side view of the On Cloudeclipse Niagara-Ivory men’s running shoe #color_niagara-ivory

Men | Running

Cloudeclipse

R 3,799.00

Crush long runs with comfort in the Cloudeclipse. On's max-cushioned road runner designed for big distances and bigger goals. Double-layer CloudTec Phase cushioning combines with Helion™ superfoam and a flexible Speedboard® to deliver a smooth, forward-rolling ride that keeps you going strong.

Right side view of the On Cloudeclipse Tangerine-Ivory women’s running shoe #color_tangerine-ivory

Women | Running

Cloudeclipse

R 3,799.00

From early morning routes in KZN to late evening jogs in the suburbs, the Cloudeclipse wraps your feet in plush, responsive comfort. With soft landings, lightweight Helion™ foam, and a breathable recycled upper, it's perfect for long-distance efforts or gentle recovery runs.

Right side view of the On Cloudflow 4 Glacier-Chambray men’s running shoe #color_glacier-chambray

Men | Running

Cloudflow 4

R 3,399.00

Designed for fast sessions and sharp goals, the Cloudflow 4 brings lightweight energy to Jozi’s intervals and CPT’s tempo runs. CloudTec® cushioning and a Speedboard® plate deliver a responsive ride from 5Ks to 21km.

Right side view of the On Cloudflow 4 Fade-Wisteria women’s running shoe #color_fade-wisteria

Women | Running

Cloudflow 4

R 3,399.00

From parkruns to weekend races, the Cloudflow 4 moves with you. It’s ultra-light, breathable, and built to respond — giving you style and speed whether you’re training in Sandton or chasing splits in Umhlanga.

Right side view of the On Cloudflow 5 Arctic-Stone women’s running shoe #color_arctic-stone

Women | Running

Cloudflow 5

R 3,899.00

Light, fast, and smooth. The Cloudflow 5 cushions every pace change with Helion™ HF foam and rolls you forward with a responsive Speedboard®. Great for 5km intervals, travel runs, or race day in the heat.

Right side view of the On Cloudflow 5 Arctic-Stone men’s running shoe #color_arctic-stone

Men | Running

Cloudflow 5

R 3,899.00

Dial into your speed. The Cloudflow 5 blends Helion™ HF foam and a nylon Speedboard® for snappy transitions and a fast, propulsive ride. Perfect for tempo runs in Johannesburg or chasing PB's on Durban tarmac.

Right side view of the On Cloudflyer 5 Arctic-Cream women’s running shoe #color_arctic-cream

Women | Running

Cloudflyer 5

R 3,749.00

The Cloudflyer 5 wraps your foot in plush comfort while staying light and stable. From morning miles to city commutes, it delivers soft landings and secure strides all day long.

Discover Other Technologies

CloudTec®

Speedboard®

Missiongrip™

CloudTec Phase®