Design: Synthetic upper lined with breathable fleece lining Two adjustable straps with metal pin buckles for a custom fit In-Shoe Comfort: Contoured cork-latex footbed creates custom support with wear Deep heel cup supports the foot tissue and holds the heel bone firmly in its natural position Heel mould activates the calf muscles, stabilizes the back of the foot, and improves gait and coordination Added support for the interior and exterior arch Transverse arch support runs through the middle of the footbed and stabilizes the metatarsal bone for a solid stance Raised indentations at the front of the footbed ensure that the toes remain loose and spread out in their natural position Drawn up footbed protects the toes during the rolling motion of the foot Genuine shearling footbed lining Durability & Traction: Flexible EVA outsole smooths out irregularities in the floor and adds comfort and shock absorption to every step Birkenstock Women's Arizona Shearling Sandals