When it was first released, back in the early 80s, the X-Caliber set numerous benchmarks for innovation. The pioneering sole design fis constructed with air channels at the front to maximise flex and improve cushioning while the Quadra lacing system makes for a perfect fit when running.
US | EU | Japan | |
---|---|---|---|
UK 6 | 7 | 40 | 25 |
UK 7 | 8 | 41.5 | 26 |
UK 8 | 9 | 42.5 | 27 |
UK 9 | 10 | 44 | 28 |
UK 10 | 11 | 45 | 28.5 |
UK 11 | 12 | 46.5 | 29.5 |
UK 12 | 13 | 48 | 30.5 |