A ski having a longitudinally extending core, a longitudinally extending running board, which defines a running surface, and longitudinally extending edges extending from each longitudinal side of the running board. Each longitudinally extending edge includes a substantially inelastic external edge. Each substantially inelastic external edge and at least a portion, of its associated longitudinally edge being situated upwardly relative to the running board and define thereby a recess which extends over the whole length of the ski. Each external edge being situated at an outer side of its respective recess.
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