Merrell MQM Flex Men's Hiking Shoes Castle Rock : For fast movers on the trail, the Merrell MQM Flex hiking shoes offer a fresh take on traditional trail footwear. With a lightweight upper made from a breathable mesh and protective TPU, youll enjoy a comfortable fit without having to spend too much time breaking the shoes in. The FLEXconnect(TM) dual-directional flex-groove EVA midsole provides natural stability. Merrell Air Cushion within the heel of the shoes helps to absorb shock and provide more support. Specialized M Select(TM) GRIP on the outsole provides durable traction for taking on rugged terrain. Upper:Lightweight, mesh and TPU Upper. Padded, bellows style tongue help to enhance comfort and keep out debris. Lace-up front offers an adjustable fit. Midsole: FLEXconnec(TM) dual-directional flex-groove EVA midsole for agility and stability. Merrell Air Cushion in the heel absorbs shock and adds stability. Trail Protect(TM) pad offers additional support off road. Outsole:M-Select(TM) GRIP tunes each outsole with even greater performance and durable traction that grips when and where needed. Merrell Air Cushion in the heel absorbs shock and adds durability. Hyperlock(TM) printed TPU film heel counter for security.