The Synchron classic features a new compression molded eva midsole which is current in most modern running shoes. The dual density construction remains true to the original version from the early 1990s.
The Synchron classic features a new compression molded eva midsole which is current in most modern running shoes. The dual density construction remains true to the original version from the early 1990s. The upper materials have been improved to premium pigskin suede from synthetic overlays while the original mesh appearance remains true to the era. To modernize the silhouette, Karhu makes the air cushion technology both visible and functional in the outsole. Most importantly, Karhu keeps the unique Synchron classic lacing structure which served as a way to tighten the forefoot upon repeated use.
The Karhu Synchron classic OG became a permanent colour combination in the Synchron classic collection.
Size guide
STEP 1
Place a piece of paper on the floor with one end against the wall. Put your foot on the piece of paper with your heel against the wall.
STEP 2
Take a pencil and mark the end of your longest toe on the paper. Repeat for your other foot.
STEP 3
Measure in cm from the wall (heel) to the longest point (toe). Take the larger measurements. Than take what you measured + 0.5 CM and compare it with our shoe sizes in the size chart.
| Shoes Length(mm) | US Men's Size | US Women's Size | UK Size | EU Size |
|---|---|---|---|---|
| 230 mm | 4 | 5.5 | 3 | 35 |
| 234 mm | 4.5 | 6 | 3.5 | 36 |
| 238 mm | 5 | 6.5 | 4 | 37 |
| 243 mm | 5.5 | 7 | 4.5 | 38 |
| 246 mm | 6 | 7.5 | 5 | 39 |
| 251 mm | 6.5 | 8 | 5.5 | 39.5 |
| 255 mm | 7 | 8.5 | 6 | 40 |
| 259 mm | 7.5 | 9 | 6.5 | 40.5 |
| 263 mm | 8 | 9.5 | 7 | 41.5 |
| 268 mm | 8.5 | 10 | 7.5 | 42 |
| 272 mm | 9 | 10.5 | 8 | 42.5 |
| 276 mm | 9.5 | 11 | 8.5 | 43.5 |
| 280 mm | 10 | 11.5 | 9 | 44 |
| 285 mm | 10.5 | 12 | 9.5 | 44.5 |
| 289 mm | 11 | 12.5 | 10 | 45 |
| 293 mm | 11.5 | 13 | 10.5 | 46 |
| 297 mm | 12 | 11 | 46.5 | |
| 301 mm | 12.5 | 11.5 | 47 | |
| 306 mm | 13 | 12 | 48 | |
| 310 mm | 14 | 13 | 49 |
