Orthaheel Womens Noosa Slip-On Black Size 6 Synthetic Rubber sole Flower applique and perforations across vamp. Adjustable hook and loop closure across vamp. Flexible and lightweight rubber outsole with wave-patterned tread helps improve traction. Invented by leading Australian podiatrist- Phillip Vasyli- this shoe features biomechanical orthotic technology that supports your feet and helps realign the lower legs- reducing over-pronation and associated aches and pains. Materials: All man made uppers/liners.