The brand new men’s Fusion 4.5 is the latest version in our Fusion line-up. The shoe remains a plush and propulsive neutral trainer with a familiar streamlined fit that seamlessly accelerates the transition from heel to toe-off.

New adjustments to the shoe utilize refined IdealKnit mesh for improved breathability and comfort, with added reflective details for improved visibility. A redesigned tongue that is softer, more accommodating, and offers a premium on-foot feel. The incorporation of nitrogen-injected AeroFoam in the midsole provides better rebound and a more cushioned experience for improved comfort during runs.

The KARHU Fusion 4.5 is the ultimate all-in-one shoe for runners seeking a unique blend of comfort, responsiveness, and performance.

Technologies KARHU Fusion 4.5
- Fulcrum + Propulsion Unit
- IdealKnit
- Nitrogen-infused AeroFoam midsole
- M-Lock lacing system

Weight US10: 302g / 10.7 oz
Heel-to-toe drop: 6mm

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The all-new men’s KARHU Fusion 4.5 HiVo Monument / Blue Haze provides a plush and propulsive ride ideal for the neutral runner. A shoe made for tempo runs, training sessions, and workouts. The newest version of the Fusion model is exceptional at seamlessly accelerating the transition from heel to toe-off, ensuring a responsive underfoot experience regardless of pace.

New adjustments to the shoe utilize refined IdealKnit mesh for improved breathability and comfort, with added reflective details for improved visibility. A redesigned tongue that is softer, more accommodating, and offers a premium on-foot feel. The incorporation of nitrogen-injected AeroFoam in the midsole provides better rebound and a more cushioned experience for improved comfort during runs. The wide fit KARHU Fusion 4.5 KARHU Fusion 4.5 is the ultimate all-in-one shoe for runners seeking a unique blend of comfort, responsiveness, and performance.

At KARHU, we understand that every runner’s feet are unique. That’s why the men’s Fusion 4.5 HiVo is crafted using insights from our growing database of over 4 million 3D foot scans. The wide fit Fusion 4.5 accommodates the needs of runners with wider feet.

Details KARHU Fusion 4.5
- Shortened Fulcrum + Propulsion unit for an efficient stride.
- Nitrogen-infused AeroFoam midsole for improved comfort during runs.
- Updated IdealKnit mesh construction with improved breathability.
-Increased visibility with reflective prints
- M-Lock lacing construction ensures a secure midfoot

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The KARHU Fusion 4.5 is a highly responsive, cushioned running shoe for neutral-footed runners. It is sure to elevate your run and propel you forward.

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Size 12.5 - Running

Size 12.5 - Running

MEN'S IKONI ATR

ICICLE / YELLOW PLUM

MEN'S FUSION 4.5 HIVO

MONUMENT / BLUE HAZE

MEN'S MESTARI RUN 1.5

BLACK / BLACK

MEN'S IKONI 3.0

BLACK / QUIET SHADE