KARHU x SAYSKY Fusion 3.5

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Featuring the same forward propulsion and plush cushioning as the Fusion 3.5, the special edition KARHU x SAYSKY Fusion 3.5 is a Nordic collaboration and celebration of the past, present and future. The two brands are joining forces to show that running is about community and moving forward in the same direction.

This swift and nimble shoe has been streamlined with a new upper and engineered for faster turnover. The Fusion features Karhu’s 3/4 length Fulcrum in the midsole that provides the quickest roll out of the Karhu shoe lineup. It concentrates the cushioning toward the heel and midfoot, creating a responsive rocker shape that stabilizes each step and propels you forward.

The plush and propulsive ride is also thanks to Karhu’s AeroFoam midsole, which is lightweight and more temperature resistant than the traditional EVA midsole foam. It provides super-soft landings, while an added propulsion unit energizes take-offs.

The new upper features a breathable engineered mesh that is designed with an intricate venting pattern and reinforced with glue print toe accents and a sleek heel counter. This new upper looks more stylish and feels more comfortable than ever.

With the KARHU x SAYSKY Fusion 3.5, you will be rolling through your runs in style.

Tech Specs

KARHU x SAYSKY Fusion 3.5


6 mm


8.8 oz (W), 10.5 oz (M)




Everyday Training


Road, Track, Treadmill

What’s New

The KARHU x SAYSKY Fusion 3.5 features a new upper and special edition colorway. The engineered mesh has an intricate venting pattern with a reinforced toe and updated heel counter.

Who It’s Best For

The KARHU x SAYSKY Fusion 3.5 is a highly responsive, cushioned running shoe for neutral-footed runners and walkers alike. This shoe can handle long miles but can also pick up the pace.

Why You’ll Love It

You will love how the Fulcrum propels you forward in the KARHU x SAYSKY Fusion 3.5. It is lightweight, breathable and more comfortable than ever before, but durable enough to handle the miles.

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