Mesh and TPU upper with traditional lace closure. Hyperlock TPU film heel counter for added security. M Select FRESH technology helps reduce shoe odor. Breathable mesh lining for added comfort. Integrated insole for enhanced proprioception and stability during movement. Merrell Barefoot 2 construction for improved sensory feedback and stability. TrailProtect rock plate protects against underfoot debris. Vibram TC5+ sole with stack height of 11.5/11.5mm. Insole thickness: 0mm, 3mm, and midsole thickness of 4/4mm. Sole has a web thickness of 1.5mm and lug thickness of 3mm. Weighs 6oz / 170g (1/2 pair). SIZING: The Trail Glove 5 is a barefoot shoe with a roomy forefoot for natural foot movement. Compared to the Trail Glove 4, it runs ½ size larger. For a similar fit to the previous version, we recommend ordering a ½ size smaller than your usual size.