Product Description The updated X-Rib pattern, that can be found throughout the Vapor line, was inspired by the OD1N concept skate. In addition to providing structural support to the skate, lab tests, designed to measure performance, showed that the X-rib pattern led to improvements in heel and ankle lock which resulted in quicker cross overs and tighter turns. This pattern is thermoformed into the sublimated tech nylon quarter construction of the X400 Junior and also offers a jump start on a great fit, the balance of which can be achieved from heat molding the skate to the shape of your foot. 0
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