Created by studying the foot in motion, This trainer is designed to enhance the foot's natural ability to stabilize the body during rapid changes in movement. Features mesh and tpu upper traditional lace closure Hyperlock tpu film heel counter for security m select fresh antimicrobial agents reduces shoe odour breathable mesh lining integrated footbed moulded nylon arch shank Merrell barefoot 2 construction for enhanced proprioception and stability during variable movement trail protect pad offers additional support off road vibram Tc5+ stack height (heel/toe): 11.5/11.5mm; footbed: 0mm; insole: 3mm; midsole: 4/4mm; sole: 1.5mm web, 3mm lug.