BIRKENSTOCK. 731483. RIO KIDS BIRKO-FLOR. SILVER. Galactically good. The BIRKENSTOCK Rio sandal is the classic kids shoe. Designed back in the 1970s it has been a laid-back summer companion for generations of children ever since. These seemingly enchanted sandals are just the ticket for little pixies. The upper is made of skin-friendly easy-clean Birko-Flor. The high-quality material not only boasts an elegant glitter effect but is covered with a protective layer to make it exceptionally abrasion-resistant and durable.