From Vionic® with Orthaheel® Technology, the Addison women's slip-on shoes feature: premium nubuck upper with contrast stitching stitch-through construction: upper is sewn onto outsole for added softness and durability stretch twin gores provide added comfort molded rubber outsole flat heel podiatrist-designed Orthaheel® Technology provides superior orthotic support, relief, and stability to help realign the feet to their natural position clinically shown to help relieve common causes of plantar fasciitis, heel pain and knee pain, related to over pronation and flat feet Imported.