The dual density construction of Karhu's Synchron Classic model remain true to the original version from the early '90s while employing a few modern features to maximize quality and comfort. Two key additions are a visible (and functional) air cushion system in the outsole and an upgrade in upper materials via premium pigskin suede.
- Premium pigskin suede throughout upper.
- Synthetic overlays.
- Visible air cushion technology in outsole.
- Original silhouette from early '90s.
- Compression molded EVA midsole.
- Unique Snychron lacing structure serves as a way to tighten the forefoot upon repeated use.