Mary janes are shoes with a strap, or multiple straps, across the top of the shoe, usually right over the top of the foot. Mary janes typically have rounded closed toes.
About TPU:
TPU, or Thermoplastic Urethane, is synthetic material used in the footwear industry to manufacture shoe outersoles and as an added compound on the midsole to prevent overpronation. TPU soles generally provide enhanced slip and abrasion resistance as well as durability.