Synchron Classic OG

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. ####description-start#### 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. ####description-end#### ####featured-start#### The unique Synchron classic lacing structure serves as a way to tighten the forefoot and makes the Synchron classic a unique lifestyle sneaker. ####featured-end####

Size	Shoe length (mm)	US women's	UK	EU
M 4 / W 5.5	230 mm	5.5	3	35
M 4.5 / W 6	234 mm	6	3.5	36
M 5 / W 6.5	238 mm	6.5	4	37
M 5.5 / W 7	243 mm	7	4.5	38
M 6 / W 7.5	246 mm	7.5	5	39
M 6.5 / W 8	251 mm	8	5.5	39.5
M 7 / W 8.5	255 mm	8.5	6	40
M 7.5 / W 9	259 mm	9	6.5	40.5
M 8 / W 9.5	263 mm	9.5	7	41.5
M 8.5 / W 10	268 mm	10	7.5	42
M 9 / W 10.5	272 mm	10.5	8	42.5
M 9.5 / W 11	276 mm	11	8.5	43.5
M 10 / W 11.5	280 mm	11.5	9	44
M 10.5 / W 12	285 mm	12	9.5	44.5
M 11 / W 12.5	289 mm	12.5	10	45
M 11.5 / W 13	293 mm	13	10.5	46
M 12 / W 13.5	297 mm	—	11	46.5
M 12.5 / W 14	301 mm	—	11.5	47
M 13 / W 14.5	306 mm	—	12	48
M 14 / W 15.5	310 mm	—	13	49