Orthaheel Fluer synthetic-and-fabric Made in USA Proven to effectively alleviate heel pain. Soft woven toe post and foam-lined strap ensure a comfortable fit. Orthaheel Technology is biomechanically designed to hug your arches and support your feet in comfort. Vionic sandals' built-in orthotic is shown to be effective in helping to treat heel pain (plantar fasciitis). Lightweight, flexible medium-density EVA midsole absorbs shock, reducing stress on feet, ankles and knees.