The Birkenstock Unisex Arizona FL Soft Footbed Sandals have a soft leather upper with two individually adjustable straps. This version has an additional foam layer for extra comfort. The deep heel cup supports the foot tissue and holds the heel bone firmly in its natural position. The heel mold activates the calf muscles, stabilizes the back of the foot, and improves gait and coordination. The arch supports that run alongside the sides of the footbed stabilize the tarsal bones inside and out. The support that runs through the middle of the footbed stabilizes the metatarsal bone. In this way, the transverse arch support helps ensure that the foot has a naturally straight and solid stance. There are raised indentations at the front of the footbed near the toes. Thanks to the toe grip, the toes remain loose and spread out in their natural position. The indentations also support the natural rolling motion of the toes. The footbed is drawn up especially high at the front. As a result, the high footbed edge protects the toes during the rolling motion of the foot.