Footwear outsole including star shapes

A footwear outsole, comprising:

• a tread attachment surface;
• and
• at least one tread member protruding from the tread attachment surface, the at least one tread member including a plurality of arm members, at least one of the arm members including a pair of straight edges arranged at an acute angle relative to each other when viewing the at least one tread member from a direction perpendicular to the tread attachment surface, the at least one tread member including a concave contact surface defined between the pair of straight edges that faces away from the tread attachment surface, the concave contact surface between the pair of straight edges being recessed partially toward the tread attachment surface.

A footwear outsole, comprising:

• a tread attachment surface;
• and
• at least one tread member protruding from the tread attachment surface, the at least one tread member including at least three arm members and defining a concave contact surface facing in a direction away from the tread attachment surface, each of the at least three arm members including a pair of planar side surfaces, the planar side surfaces extending from the tread attachment surface to the contact surface in a direction substantially perpendicular to the tread attachment surface, wherein at least a portion of the concave contact surface is defined between the pair of planar side surfaces of at least one of the arm members, the at least a portion of the concave contact surface between the pair of planar side surface being recessed partially toward the tread attachment surface relative to edges where the pair of planar side surfaces and the concave contact surface meet.

A footwear outsole, comprising:

• a tread attachment surface;
• an array of tread members integrally molded to the tread attachment surface, wherein at least some of the tread members include at least three arm members extending from a core portion, wherein the core portion is located central to the arm members, wherein each arm member is directly connected to the tread attachment surface and extends away from the tread attachment surface, and wherein the core portion and the arm members of the tread members define a concave ground contact surface wherein the ground contact surface includes a continuous curve between the core portion and in the arm members.