The Solo AC+ is a ressurected '80s classic with some modern twists for better comfort, heel-to-toe support, and breathability. Tough, smooth microfiber faux-suede and mesh upper with breathable mesh lining. Traditional lace-up closure. FIT.ECO contoured EVA footbed with organic odor control. Merrell Air Cushion+ system ensures heel to toe comfort in it's air-ride system with strategically placed lugs for added traction and cushion. EVA midsole for stability and added comfort.