Island features the same great fmt technology and fit you've come to love and expect! this iconic, best-selling style now features leather trim and an updated tread pattern. Soft woven toe-post with padded neoprene straps ensure a comfortable fit. •Fmt 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. •Durable tpr outsole with patterned tread helps improve traction. •Recommended by Dr. Andrew weil. •Received apma seal of acceptance.