Mesh and TPU upper and traditional lace closure Hyperlock TPU film heel counter for security. Breathable mesh lining. Integrated insole. Merrell Barefoot 2 construction for enhanced proprioception and stability during variable movement. TrailProtect rock plate protects feet from underfoot debris. Vibram TC5+. The Trail Glove 5 is a barefoot shoe, and has been built with a full forefoot to allow for a more natural foot movement. When compared to the Trail Glove 4, it is running size large. If you're looking for a similar fit to our previous version, we recommend you order a size smaller than your typical size.