Birkenstock Rio Kids Microfiber Iridescent MatchaSporty and fun, the Rio gives kids the kind of comfort that can keep up, plus a vegan upper and footbed lining you can feel good about, too. The iridescent material catches the light wherever they wander, with tonal details that tie in the favorite spring shade. An original BIRKENSTOCK footbed supports them through it all, while an adjustable backstrap keeps them secure as they play the day away. Contoured cork latex footbed creates custom support