主权项 |
1. A sole for a shoe, comprising:
a heel, a midsole and a tread, the tread comprising:
a central recess;a side wall extending about the side of the sole and around the central recess, the side wall having ends extending inwardly from the edge of the sole into the central recess;a V-shaped protrusion between the ends of the side wall; anda recess in the V-shaped protrusion. |