Full grain leather upper Traditional lace closure Breathable mesh lining Integrated footbed Unifly midsole connects you to the trail Moulded nylon arch shank M-Select GRIP outsole tunes each outsole with durable traction that grips when and where you need it Merrell's Fusion chukka boots offer a high performance take on a casual style. Made from full grain leather with a breathable mesh lining, the M-Select GRIP outsole provides comfort and durable traction underfoot.