Fit & Sizing GuidesJared WatsonMarch 12, 2023Retro Runners, Karhu, Karhu Fusion 2.0 Sizing Guide: How Does The Karhu Fusion 2.0 Fit? Get the most accurate Karhu Fusion 2.0 fit and sizing tips on the internet - based on real-world experience and testing. Fit & Sizing GuidesJared WatsonMarch 12, 2023Retro Runners, Karhu, Karhu Fusion 2.0