The Merrell MQM Ace hybrid shoe is inspired by athletes but made for the everyday hiker who wants to take their performance to the next level. Engineered mesh and TPU upper. Low-profile shoe for added freedom of movement. M SelectTM FRESH antimicrobial agents reduces shoe odor. Lace-to-toe lacing and hook for a secure fit. Padded tongue and collar. Breathable mesh lining. Floating HypercageTM for lightweight support and easy movement. Removable Kinetic FitTM BASE contoured insole provides flexible support and underfoot comfort. Merrell Air Cushion in the heel absorbs shock and provides added underfoot comfort. Compression-molded EVA midsole for stability and comfort. FLEXconnectTM dual-directional flex-groove in EVA midsole for agility and stability. TrailProtectTM rock plate protects feet from underfoot debris. Vibram® outsole with Megagrip® technology tunes each outsole with durable traction that grips when and where you need it. 4mm lug depth.