Fyn's sturdy EVA midsole adds stability to this sleek active sneaker. With an improved rubber tread for added traction, contrasting ombre laces and breathable mesh upper with a hint of stretch, Fyn is a true winner. Stretch textile upper. Firm yet flexible, removable textile-covered EVA orthotic insert. Durable rubber outsole. Vionic active footwear features Advanced Motion System (AMS) technology, combining our podiatrist-designed orthotic with a flexible, cushioned outsole and a lightweight, breathable upper. Step into support for work, play and everyday. Recommended by Dr. Andrew Weil.