From Merrell, the Women's Speed Arc Matis Mesh Hiking Sneakers feature: Breathable mesh and TPU upper 60% recycled laces Padded collar 100% recycled breathable mesh lining 100% recycled mesh footbed cover Cleansport NXT™ treated for natural odor control Integrated EVA foam insole Lightweight FlexPlate™ technology provides torsional rigidity, lateral stability, and forefoot flexibility FloatPro™ Foam midsole for lightweight comfort that lasts Molded TPU heel counter for security Vibram MegaGrip high performance rubber outsole features unparalleled grip on both dry and wet surfaces Lug: 3mm Imported.