A prosthetic foot structure includes a primary foot member and a heel member. The primary foot member has 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. The heel member includes a hollow cylindrical spring wall extending downward from the heel portion of the primary foot member. The primary foot member and the heel member are portions of a unitary body of material formed by additive manufacturing.