Additive manufacturing produced prosthetic foot

A prosthetic foot structure, comprising:

• a primary foot member having a heel portion, a toe portion with a pair of toe sections separated by a gap, and an elongated intermediate portion configured as an arch extending downward from the heel portion toward the toe portion;
• and
• a heel member including a hollow cylindrical spring wall extending downward from the heel portion of the primary foot member;
• wherein the spring wall has circumferentially elongated apertures reaching through the spring wall, the apertures are arranged in rows reaching fully around the spring wall, and the apertures in each row are circumferentially staggered relative the apertures in an adjacent row.