Geox Girls Sandals, Adjustable straps across toes. The Geox Karly is a great looking girls sandal from Geox. There is a synthetic upper with a synthetic lining and a padded leather footbed. There are three adjustable velcro straps, one around the ankle and two across the toes to keep the Geox sandals secure on the foot and to offer the perfect fit. These Geox sandals also contain the unique Geox perforated sole unit that allows the sandals to breathe, in that they allow the hot sweaty air inside the sandal to escape, while stopping any moisture getting back onto the foot.