Tide II features the same great Orthaheel Technology and fit think of when you think of VIONIC! This timeless, best-selling style now features leather trim and an updated tread pattern which allows you to be stylish but simple all at the same time. Details 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. Durable TPR outsole with patterned tread helps improve traction. Woven/leather uppers with padded neoprene upper liner.