Vionic Kona Sneaker Kona's sturdy EVA midsole adds stability to this sleek active sneaker. With an improved rubber tread for added traction, colorful laces draw attention to a fun sneaker shaped from breathable mesh. The Kona is a true winner. Mesh and faux leather upper. Firm yet flexible, removable textile-covered EVA orthotic insert. Durable rubber outsole. Advanced Motion System (AMS) technology. Podiatrist-designed orthotic with a flexible, cushioned outsole. Lightweight, breathable upper Recommended by Dr. Andrew Weil.