Etonic Men's Tayu TR Neutral Performance Running Shoe 100% Air mesh Rubber sole A lightweight, breathable shoe that provides an expectional ride due to its lightweight, resilient midsole designed to maximize performance RCS (resilient cushion system) is used in the heel for impact protection TPU shank for smooth heel to toe transition Performance shoe for the runner looking for a shoe that is lightweight, flexible and responsive for faster paced running or racing For efficient runners with a medium to high arch neutral foot type who want a munimal type lightweight shoe with a responsive ride