This VIbram design has a soft vented upper to allow your foot to breathe. The shoe has a thin sole construction that lets you feel your run, giving you a barefoot running experience while still protecting your feet. Upper: 92% polyester lycra stretch mesh, 8% polyester microfiber rubber sole perforated upper for maximum breathability adjustable pull tab and cord lace closure anti-microbial drilex insole machine wash, air dry coral with bright highligher-green accents preowned. no holes. some dirt discoloration and some tread wear on soles. Please see photos for details and condition. Please comment with any questions BRC