MBT Men's Jengo Sport Nuetral Walking Shoes in Black and Gray. A mixture of synthetic leather and mesh uppers with a mesh footbed. MBT patented rocker sole and non-marking outsole. The natural instability of the unique MBT (or Masai Barefoot Technology) sole imitates walking on soft, uneven surfaces. The technology in the sole has been patented worldwide to provide the greatest comfort possible, as it allows you to enjoy the natural benefits of walking every day. Size 8-8.5. Like new!