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The Karhu Fusion Ortix F100322 are high-cushioning running shoes for neutral-footed runners who don't compromise between responsiveness and comfort. The Ortix Fit technology — developed from over 1.3 million 3D foot scans — ensures a precise anatomical fit. Barely Blue/Vallarta Blue color, ultra-responsive AeroFoam midsole, shortened Fulcrum system for a smooth and fast heel-to-toe transition.
Technical Features
Code: F100322 | Color: Barely Blue / Vallarta Blue
Ortix Fit Technology: anatomical fit from 1.3M+ 3D scans
Midsole: Ultra-light, highly responsive AeroFoam
Upper: Revamped IdealKnit — breathable and lightweight
Fulcrum System: shortened for quick heel-to-toe transition
M-Lock System: optimal lateral stability
Drop: 6mm | Weight: ~300g (size 44)
Foot type: Neutral | Cushioning: High with extra forefoot
Ideal If...
You are looking for men's running shoes with high cushioning and advanced technology
You run on asphalt with a neutral foot and want responsiveness without sacrificing comfort
You train for 10km, half marathon or long runs up to 30km
You want premium Finnish Karhu quality at a competitive outlet price
Fit and Sizing
Regular fit with Ortix Fit technology that anatomically adapts to the foot. The IdealKnit upper provides secure support without compression. If you have wide feet or prefer a more comfortable fit, consider half a size up. Similar fit to Brooks Ghost, slightly narrower than Hoka Clifton, more generous than Nike Pegasus.
Maintenance: Clean with a damp cloth and neutral soap. Do not machine wash, do not tumble dry. Air dry at room temperature. Replace every 600-800km to maintain optimal cushioning.
Why Karhu: Finnish brand founded in 1916, pioneer of technical running shoes. The Fusion Ortix represent the pinnacle of the performance range with exclusive Ortix Fit technology.
FAQ
Are the Karhu Fusion Ortix F100322 suitable for marathons? Yes, if you have neutral feet and weigh under 85kg. For heavier runners or pronators, consider models with stability support.
What size should I choose? Regular fit. If you have wide feet or prefer more room, take half a size up from your usual size.
How long do they last? 600-800km on average, depending on body weight, running technique, and surfaces used.
Are they suitable for trail running? No, they are optimized for asphalt and compact surfaces. For trail, choose a specific model with an aggressive outsole.
What is the drop? 6mm — ideal for runners looking for a compromise between natural feel and protection.
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