Abstract: An outsole (2) for footwear (1) comprises at least one protrusion (4) having a portion (8) configured for supporting the footwear against a ground surface (S). A traction-enhancing element (6) is connected to the protrusion (4) and selectively insertable between said portion (8) and the ground surface (S). The traction-enhancing element is attached to at least a portion of the protrusion and configured for bending between a first position and a second position; wherein the traction-enhancing element in the second position is between said portion and the ground surface. The movement of the traction-enhancing element between the first position and the second position is effected by a movement of the footwear predominantly along the ground surface.