Orthaheel Vionic Tide Synthetic Note, we may substitute the new version if you select Black, Bronze, Gold, or Navy. Convenient,pain-free \"natural healing\" solution to many of the common achesand pains associated with poor lower limb alignment. Orthaheeltechnology is clinically proven to reduce excess pronation, acontributing factor to \"flat feet.\" & plantarfasciitis Podiatrist-designed, biomechanical Tri-planar MotionControl footbed with a deep heel cup helps stabilize, support andrealign the feet back to their natural position.